Mercurial > hg > graal-compiler
annotate src/share/vm/oops/instanceKlass.cpp @ 7643:3ac7d10a6572
Merge with hsx25/hotspot.
| author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
|---|---|
| date | Thu, 31 Jan 2013 15:42:25 +0100 |
| parents | 989155e2d07a ed6154d7d259 |
| children | 5fc51c1ecdeb |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved. |
| 0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #include "precompiled.hpp" |
| 26 #include "classfile/javaClasses.hpp" | |
| 27 #include "classfile/systemDictionary.hpp" | |
| 28 #include "classfile/verifier.hpp" | |
| 29 #include "classfile/vmSymbols.hpp" | |
| 30 #include "compiler/compileBroker.hpp" | |
| 31 #include "gc_implementation/shared/markSweep.inline.hpp" | |
| 32 #include "gc_interface/collectedHeap.inline.hpp" | |
| 33 #include "interpreter/oopMapCache.hpp" | |
| 34 #include "interpreter/rewriter.hpp" | |
| 35 #include "jvmtifiles/jvmti.h" | |
| 36 #include "memory/genOopClosures.inline.hpp" | |
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37 #include "memory/metadataFactory.hpp" |
| 1972 | 38 #include "memory/oopFactory.hpp" |
| 3938 | 39 #include "oops/fieldStreams.hpp" |
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40 #include "oops/instanceClassLoaderKlass.hpp" |
| 1972 | 41 #include "oops/instanceKlass.hpp" |
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42 #include "oops/instanceMirrorKlass.hpp" |
| 1972 | 43 #include "oops/instanceOop.hpp" |
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44 #include "oops/klass.inline.hpp" |
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45 #include "oops/method.hpp" |
| 1972 | 46 #include "oops/oop.inline.hpp" |
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47 #include "oops/symbol.hpp" |
| 1972 | 48 #include "prims/jvmtiExport.hpp" |
| 49 #include "prims/jvmtiRedefineClassesTrace.hpp" | |
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50 #include "prims/methodComparator.hpp" |
| 1972 | 51 #include "runtime/fieldDescriptor.hpp" |
| 52 #include "runtime/handles.inline.hpp" | |
| 53 #include "runtime/javaCalls.hpp" | |
| 54 #include "runtime/mutexLocker.hpp" | |
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55 #include "runtime/thread.inline.hpp" |
| 1972 | 56 #include "services/threadService.hpp" |
| 57 #include "utilities/dtrace.hpp" | |
| 58 #ifndef SERIALGC | |
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59 #include "gc_implementation/concurrentMarkSweep/cmsOopClosures.inline.hpp" |
| 1972 | 60 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp" |
| 61 #include "gc_implementation/g1/g1OopClosures.inline.hpp" | |
| 62 #include "gc_implementation/g1/g1RemSet.inline.hpp" | |
| 63 #include "gc_implementation/g1/heapRegionSeq.inline.hpp" | |
| 64 #include "gc_implementation/parNew/parOopClosures.inline.hpp" | |
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65 #include "gc_implementation/parallelScavenge/parallelScavengeHeap.inline.hpp" |
| 1972 | 66 #include "gc_implementation/parallelScavenge/psPromotionManager.inline.hpp" |
| 67 #include "gc_implementation/parallelScavenge/psScavenge.inline.hpp" | |
| 68 #include "oops/oop.pcgc.inline.hpp" | |
| 69 #endif | |
| 70 #ifdef COMPILER1 | |
| 71 #include "c1/c1_Compiler.hpp" | |
| 72 #endif | |
| 0 | 73 |
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74 #ifdef DTRACE_ENABLED |
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75 |
| 4006 | 76 #ifndef USDT2 |
| 77 | |
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78 HS_DTRACE_PROBE_DECL4(hotspot, class__initialization__required, |
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79 char*, intptr_t, oop, intptr_t); |
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80 HS_DTRACE_PROBE_DECL5(hotspot, class__initialization__recursive, |
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81 char*, intptr_t, oop, intptr_t, int); |
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82 HS_DTRACE_PROBE_DECL5(hotspot, class__initialization__concurrent, |
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83 char*, intptr_t, oop, intptr_t, int); |
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84 HS_DTRACE_PROBE_DECL5(hotspot, class__initialization__erroneous, |
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85 char*, intptr_t, oop, intptr_t, int); |
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86 HS_DTRACE_PROBE_DECL5(hotspot, class__initialization__super__failed, |
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87 char*, intptr_t, oop, intptr_t, int); |
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88 HS_DTRACE_PROBE_DECL5(hotspot, class__initialization__clinit, |
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89 char*, intptr_t, oop, intptr_t, int); |
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90 HS_DTRACE_PROBE_DECL5(hotspot, class__initialization__error, |
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91 char*, intptr_t, oop, intptr_t, int); |
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92 HS_DTRACE_PROBE_DECL5(hotspot, class__initialization__end, |
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93 char*, intptr_t, oop, intptr_t, int); |
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94 |
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95 #define DTRACE_CLASSINIT_PROBE(type, clss, thread_type) \ |
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96 { \ |
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97 char* data = NULL; \ |
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98 int len = 0; \ |
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99 Symbol* name = (clss)->name(); \ |
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100 if (name != NULL) { \ |
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101 data = (char*)name->bytes(); \ |
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102 len = name->utf8_length(); \ |
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103 } \ |
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104 HS_DTRACE_PROBE4(hotspot, class__initialization__##type, \ |
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105 data, len, (clss)->class_loader(), thread_type); \ |
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106 } |
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107 |
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108 #define DTRACE_CLASSINIT_PROBE_WAIT(type, clss, thread_type, wait) \ |
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109 { \ |
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110 char* data = NULL; \ |
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111 int len = 0; \ |
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112 Symbol* name = (clss)->name(); \ |
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113 if (name != NULL) { \ |
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114 data = (char*)name->bytes(); \ |
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115 len = name->utf8_length(); \ |
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116 } \ |
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117 HS_DTRACE_PROBE5(hotspot, class__initialization__##type, \ |
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118 data, len, (clss)->class_loader(), thread_type, wait); \ |
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119 } |
| 4006 | 120 #else /* USDT2 */ |
| 121 | |
| 122 #define HOTSPOT_CLASS_INITIALIZATION_required HOTSPOT_CLASS_INITIALIZATION_REQUIRED | |
| 123 #define HOTSPOT_CLASS_INITIALIZATION_recursive HOTSPOT_CLASS_INITIALIZATION_RECURSIVE | |
| 124 #define HOTSPOT_CLASS_INITIALIZATION_concurrent HOTSPOT_CLASS_INITIALIZATION_CONCURRENT | |
| 125 #define HOTSPOT_CLASS_INITIALIZATION_erroneous HOTSPOT_CLASS_INITIALIZATION_ERRONEOUS | |
| 126 #define HOTSPOT_CLASS_INITIALIZATION_super__failed HOTSPOT_CLASS_INITIALIZATION_SUPER_FAILED | |
| 127 #define HOTSPOT_CLASS_INITIALIZATION_clinit HOTSPOT_CLASS_INITIALIZATION_CLINIT | |
| 128 #define HOTSPOT_CLASS_INITIALIZATION_error HOTSPOT_CLASS_INITIALIZATION_ERROR | |
| 129 #define HOTSPOT_CLASS_INITIALIZATION_end HOTSPOT_CLASS_INITIALIZATION_END | |
| 130 #define DTRACE_CLASSINIT_PROBE(type, clss, thread_type) \ | |
| 131 { \ | |
| 132 char* data = NULL; \ | |
| 133 int len = 0; \ | |
| 134 Symbol* name = (clss)->name(); \ | |
| 135 if (name != NULL) { \ | |
| 136 data = (char*)name->bytes(); \ | |
| 137 len = name->utf8_length(); \ | |
| 138 } \ | |
| 139 HOTSPOT_CLASS_INITIALIZATION_##type( \ | |
| 140 data, len, (clss)->class_loader(), thread_type); \ | |
| 141 } | |
| 142 | |
| 143 #define DTRACE_CLASSINIT_PROBE_WAIT(type, clss, thread_type, wait) \ | |
| 144 { \ | |
| 145 char* data = NULL; \ | |
| 146 int len = 0; \ | |
| 147 Symbol* name = (clss)->name(); \ | |
| 148 if (name != NULL) { \ | |
| 149 data = (char*)name->bytes(); \ | |
| 150 len = name->utf8_length(); \ | |
| 151 } \ | |
| 152 HOTSPOT_CLASS_INITIALIZATION_##type( \ | |
| 153 data, len, (clss)->class_loader(), thread_type, wait); \ | |
| 154 } | |
| 155 #endif /* USDT2 */ | |
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156 |
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157 #else // ndef DTRACE_ENABLED |
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158 |
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159 #define DTRACE_CLASSINIT_PROBE(type, clss, thread_type) |
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160 #define DTRACE_CLASSINIT_PROBE_WAIT(type, clss, thread_type, wait) |
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161 |
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162 #endif // ndef DTRACE_ENABLED |
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163 |
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164 volatile int InstanceKlass::_total_instanceKlass_count = 0; |
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165 |
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166 Klass* InstanceKlass::allocate_instance_klass(ClassLoaderData* loader_data, |
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167 int vtable_len, |
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168 int itable_len, |
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169 int static_field_size, |
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170 int nonstatic_oop_map_size, |
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171 ReferenceType rt, |
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172 AccessFlags access_flags, |
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173 Symbol* name, |
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174 Klass* super_klass, |
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175 KlassHandle host_klass, |
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176 TRAPS) { |
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177 |
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178 int size = InstanceKlass::size(vtable_len, itable_len, nonstatic_oop_map_size, |
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179 access_flags.is_interface(), |
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180 !host_klass.is_null()); |
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181 |
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182 // Allocation |
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183 InstanceKlass* ik; |
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184 if (rt == REF_NONE) { |
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185 if (name == vmSymbols::java_lang_Class()) { |
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186 ik = new (loader_data, size, THREAD) InstanceMirrorKlass( |
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187 vtable_len, itable_len, static_field_size, nonstatic_oop_map_size, rt, |
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188 access_flags, !host_klass.is_null()); |
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189 } else if (name == vmSymbols::java_lang_ClassLoader() || |
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190 (SystemDictionary::ClassLoader_klass_loaded() && |
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191 super_klass != NULL && |
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192 super_klass->is_subtype_of(SystemDictionary::ClassLoader_klass()))) { |
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193 ik = new (loader_data, size, THREAD) InstanceClassLoaderKlass( |
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194 vtable_len, itable_len, static_field_size, nonstatic_oop_map_size, rt, |
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195 access_flags, !host_klass.is_null()); |
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196 } else { |
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197 // normal class |
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198 ik = new (loader_data, size, THREAD) InstanceKlass( |
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199 vtable_len, itable_len, static_field_size, nonstatic_oop_map_size, rt, |
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200 access_flags, !host_klass.is_null()); |
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201 } |
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202 } else { |
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203 // reference klass |
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204 ik = new (loader_data, size, THREAD) InstanceRefKlass( |
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205 vtable_len, itable_len, static_field_size, nonstatic_oop_map_size, rt, |
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206 access_flags, !host_klass.is_null()); |
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207 } |
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208 |
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209 Atomic::inc(&_total_instanceKlass_count); |
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210 return ik; |
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211 } |
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212 |
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213 InstanceKlass::InstanceKlass(int vtable_len, |
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214 int itable_len, |
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215 int static_field_size, |
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216 int nonstatic_oop_map_size, |
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217 ReferenceType rt, |
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218 AccessFlags access_flags, |
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219 bool is_anonymous) { |
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220 No_Safepoint_Verifier no_safepoint; // until k becomes parsable |
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221 |
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222 int size = InstanceKlass::size(vtable_len, itable_len, nonstatic_oop_map_size, |
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223 access_flags.is_interface(), is_anonymous); |
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224 |
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225 // The sizes of these these three variables are used for determining the |
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226 // size of the instanceKlassOop. It is critical that these are set to the right |
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227 // sizes before the first GC, i.e., when we allocate the mirror. |
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228 this->set_vtable_length(vtable_len); |
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229 this->set_itable_length(itable_len); |
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230 this->set_static_field_size(static_field_size); |
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231 this->set_nonstatic_oop_map_size(nonstatic_oop_map_size); |
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232 this->set_access_flags(access_flags); |
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233 this->set_is_anonymous(is_anonymous); |
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234 assert(this->size() == size, "wrong size for object"); |
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235 |
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236 this->set_array_klasses(NULL); |
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237 this->set_methods(NULL); |
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238 this->set_method_ordering(NULL); |
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239 this->set_local_interfaces(NULL); |
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240 this->set_transitive_interfaces(NULL); |
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241 this->init_implementor(); |
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242 this->set_fields(NULL, 0); |
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243 this->set_constants(NULL); |
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244 this->set_class_loader_data(NULL); |
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245 this->set_protection_domain(NULL); |
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246 this->set_signers(NULL); |
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247 this->set_source_file_name(NULL); |
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248 this->set_source_debug_extension(NULL, 0); |
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249 this->set_array_name(NULL); |
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250 this->set_inner_classes(NULL); |
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251 this->set_static_oop_field_count(0); |
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252 this->set_nonstatic_field_size(0); |
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253 this->set_is_marked_dependent(false); |
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254 this->set_init_state(InstanceKlass::allocated); |
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255 this->set_init_thread(NULL); |
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256 this->set_init_lock(NULL); |
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257 this->set_reference_type(rt); |
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258 this->set_oop_map_cache(NULL); |
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259 this->set_jni_ids(NULL); |
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260 this->set_osr_nmethods_head(NULL); |
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261 this->set_breakpoints(NULL); |
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262 this->init_previous_versions(); |
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263 this->set_generic_signature(NULL); |
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264 this->release_set_methods_jmethod_ids(NULL); |
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265 this->release_set_methods_cached_itable_indices(NULL); |
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266 this->set_annotations(NULL); |
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267 this->set_jvmti_cached_class_field_map(NULL); |
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268 this->set_initial_method_idnum(0); |
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269 |
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270 // initialize the non-header words to zero |
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271 intptr_t* p = (intptr_t*)this; |
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272 for (int index = InstanceKlass::header_size(); index < size; index++) { |
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273 p[index] = NULL_WORD; |
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274 } |
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275 |
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276 // Set temporary value until parseClassFile updates it with the real instance |
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277 // size. |
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278 this->set_layout_helper(Klass::instance_layout_helper(0, true)); |
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279 } |
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280 |
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281 |
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282 // This function deallocates the metadata and C heap pointers that the |
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283 // InstanceKlass points to. |
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284 void InstanceKlass::deallocate_contents(ClassLoaderData* loader_data) { |
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285 |
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286 // Orphan the mirror first, CMS thinks it's still live. |
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287 java_lang_Class::set_klass(java_mirror(), NULL); |
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288 |
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289 // Need to take this class off the class loader data list. |
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290 loader_data->remove_class(this); |
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291 |
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292 // The array_klass for this class is created later, after error handling. |
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293 // For class redefinition, we keep the original class so this scratch class |
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294 // doesn't have an array class. Either way, assert that there is nothing |
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295 // to deallocate. |
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296 assert(array_klasses() == NULL, "array classes shouldn't be created for this class yet"); |
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297 |
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298 // Release C heap allocated data that this might point to, which includes |
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299 // reference counting symbol names. |
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300 release_C_heap_structures(); |
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301 |
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302 Array<Method*>* ms = methods(); |
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303 if (ms != Universe::the_empty_method_array()) { |
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304 for (int i = 0; i <= methods()->length() -1 ; i++) { |
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305 Method* method = methods()->at(i); |
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306 // Only want to delete methods that are not executing for RedefineClasses. |
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307 // The previous version will point to them so they're not totally dangling |
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308 assert (!method->on_stack(), "shouldn't be called with methods on stack"); |
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309 MetadataFactory::free_metadata(loader_data, method); |
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310 } |
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311 MetadataFactory::free_array<Method*>(loader_data, methods()); |
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312 } |
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313 set_methods(NULL); |
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314 |
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315 if (method_ordering() != Universe::the_empty_int_array()) { |
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316 MetadataFactory::free_array<int>(loader_data, method_ordering()); |
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317 } |
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318 set_method_ordering(NULL); |
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319 |
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320 // This array is in Klass, but remove it with the InstanceKlass since |
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321 // this place would be the only caller and it can share memory with transitive |
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322 // interfaces. |
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323 if (secondary_supers() != Universe::the_empty_klass_array() && |
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324 secondary_supers() != transitive_interfaces()) { |
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325 MetadataFactory::free_array<Klass*>(loader_data, secondary_supers()); |
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326 } |
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327 set_secondary_supers(NULL); |
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328 |
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329 // Only deallocate transitive interfaces if not empty, same as super class |
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330 // or same as local interfaces. See code in parseClassFile. |
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331 Array<Klass*>* ti = transitive_interfaces(); |
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332 if (ti != Universe::the_empty_klass_array() && ti != local_interfaces()) { |
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333 // check that the interfaces don't come from super class |
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334 Array<Klass*>* sti = (super() == NULL) ? NULL : |
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335 InstanceKlass::cast(super())->transitive_interfaces(); |
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336 if (ti != sti) { |
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337 MetadataFactory::free_array<Klass*>(loader_data, ti); |
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338 } |
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339 } |
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340 set_transitive_interfaces(NULL); |
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341 |
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342 // local interfaces can be empty |
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343 Array<Klass*>* li = local_interfaces(); |
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344 if (li != Universe::the_empty_klass_array()) { |
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345 MetadataFactory::free_array<Klass*>(loader_data, li); |
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346 } |
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347 set_local_interfaces(NULL); |
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348 |
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349 MetadataFactory::free_array<jushort>(loader_data, fields()); |
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350 set_fields(NULL, 0); |
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351 |
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352 // If a method from a redefined class is using this constant pool, don't |
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353 // delete it, yet. The new class's previous version will point to this. |
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354 assert (!constants()->on_stack(), "shouldn't be called if anything is onstack"); |
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355 MetadataFactory::free_metadata(loader_data, constants()); |
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356 set_constants(NULL); |
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357 |
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358 if (inner_classes() != Universe::the_empty_short_array()) { |
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359 MetadataFactory::free_array<jushort>(loader_data, inner_classes()); |
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360 } |
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361 set_inner_classes(NULL); |
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362 |
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363 // Null out Java heap objects, although these won't be walked to keep |
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364 // alive once this InstanceKlass is deallocated. |
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365 set_protection_domain(NULL); |
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366 set_signers(NULL); |
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367 set_init_lock(NULL); |
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368 |
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369 // We should deallocate the Annotations instance |
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370 MetadataFactory::free_metadata(loader_data, annotations()); |
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371 set_annotations(NULL); |
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372 } |
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373 |
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374 volatile oop InstanceKlass::init_lock() const { |
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375 volatile oop lock = _init_lock; // read once |
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376 assert((oop)lock != NULL || !is_not_initialized(), // initialized or in_error state |
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377 "only fully initialized state can have a null lock"); |
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378 return lock; |
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379 } |
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380 |
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381 // Set the initialization lock to null so the object can be GC'ed. Any racing |
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382 // threads to get this lock will see a null lock and will not lock. |
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383 // That's okay because they all check for initialized state after getting |
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384 // the lock and return. |
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385 void InstanceKlass::fence_and_clear_init_lock() { |
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386 // make sure previous stores are all done, notably the init_state. |
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387 OrderAccess::storestore(); |
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388 klass_oop_store(&_init_lock, NULL); |
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389 assert(!is_not_initialized(), "class must be initialized now"); |
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390 } |
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391 |
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392 |
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393 bool InstanceKlass::should_be_initialized() const { |
| 0 | 394 return !is_initialized(); |
| 395 } | |
| 396 | |
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397 klassVtable* InstanceKlass::vtable() const { |
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398 return new klassVtable(this, start_of_vtable(), vtable_length() / vtableEntry::size()); |
| 0 | 399 } |
| 400 | |
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401 klassItable* InstanceKlass::itable() const { |
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402 return new klassItable(instanceKlassHandle(this)); |
| 0 | 403 } |
| 404 | |
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405 void InstanceKlass::eager_initialize(Thread *thread) { |
| 0 | 406 if (!EagerInitialization) return; |
| 407 | |
| 408 if (this->is_not_initialized()) { | |
| 409 // abort if the the class has a class initializer | |
| 410 if (this->class_initializer() != NULL) return; | |
| 411 | |
| 412 // abort if it is java.lang.Object (initialization is handled in genesis) | |
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413 Klass* super = this->super(); |
| 0 | 414 if (super == NULL) return; |
| 415 | |
| 416 // abort if the super class should be initialized | |
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417 if (!InstanceKlass::cast(super)->is_initialized()) return; |
| 0 | 418 |
| 419 // call body to expose the this pointer | |
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420 instanceKlassHandle this_oop(thread, this); |
| 0 | 421 eager_initialize_impl(this_oop); |
| 422 } | |
| 423 } | |
| 424 | |
| 425 | |
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426 void InstanceKlass::eager_initialize_impl(instanceKlassHandle this_oop) { |
| 0 | 427 EXCEPTION_MARK; |
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428 volatile oop init_lock = this_oop->init_lock(); |
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429 ObjectLocker ol(init_lock, THREAD, init_lock != NULL); |
| 0 | 430 |
| 431 // abort if someone beat us to the initialization | |
| 432 if (!this_oop->is_not_initialized()) return; // note: not equivalent to is_initialized() | |
| 433 | |
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434 ClassState old_state = this_oop->init_state(); |
| 0 | 435 link_class_impl(this_oop, true, THREAD); |
| 436 if (HAS_PENDING_EXCEPTION) { | |
| 437 CLEAR_PENDING_EXCEPTION; | |
| 438 // Abort if linking the class throws an exception. | |
| 439 | |
| 440 // Use a test to avoid redundantly resetting the state if there's | |
| 441 // no change. Set_init_state() asserts that state changes make | |
| 442 // progress, whereas here we might just be spinning in place. | |
| 443 if( old_state != this_oop->_init_state ) | |
| 444 this_oop->set_init_state (old_state); | |
| 445 } else { | |
| 446 // linking successfull, mark class as initialized | |
| 447 this_oop->set_init_state (fully_initialized); | |
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448 this_oop->fence_and_clear_init_lock(); |
| 0 | 449 // trace |
| 450 if (TraceClassInitialization) { | |
| 451 ResourceMark rm(THREAD); | |
| 452 tty->print_cr("[Initialized %s without side effects]", this_oop->external_name()); | |
| 453 } | |
| 454 } | |
| 455 } | |
| 456 | |
| 457 | |
| 458 // See "The Virtual Machine Specification" section 2.16.5 for a detailed explanation of the class initialization | |
| 459 // process. The step comments refers to the procedure described in that section. | |
| 460 // Note: implementation moved to static method to expose the this pointer. | |
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461 void InstanceKlass::initialize(TRAPS) { |
| 0 | 462 if (this->should_be_initialized()) { |
| 463 HandleMark hm(THREAD); | |
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464 instanceKlassHandle this_oop(THREAD, this); |
| 0 | 465 initialize_impl(this_oop, CHECK); |
| 466 // Note: at this point the class may be initialized | |
| 467 // OR it may be in the state of being initialized | |
| 468 // in case of recursive initialization! | |
| 469 } else { | |
| 470 assert(is_initialized(), "sanity check"); | |
| 471 } | |
| 472 } | |
| 473 | |
| 474 | |
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475 bool InstanceKlass::verify_code( |
| 0 | 476 instanceKlassHandle this_oop, bool throw_verifyerror, TRAPS) { |
| 477 // 1) Verify the bytecodes | |
| 478 Verifier::Mode mode = | |
| 479 throw_verifyerror ? Verifier::ThrowException : Verifier::NoException; | |
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480 return Verifier::verify(this_oop, mode, this_oop->should_verify_class(), CHECK_false); |
| 0 | 481 } |
| 482 | |
| 483 | |
| 484 // Used exclusively by the shared spaces dump mechanism to prevent | |
| 485 // classes mapped into the shared regions in new VMs from appearing linked. | |
| 486 | |
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487 void InstanceKlass::unlink_class() { |
| 0 | 488 assert(is_linked(), "must be linked"); |
| 489 _init_state = loaded; | |
| 490 } | |
| 491 | |
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492 void InstanceKlass::link_class(TRAPS) { |
| 0 | 493 assert(is_loaded(), "must be loaded"); |
| 494 if (!is_linked()) { | |
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495 HandleMark hm(THREAD); |
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496 instanceKlassHandle this_oop(THREAD, this); |
| 0 | 497 link_class_impl(this_oop, true, CHECK); |
| 498 } | |
| 499 } | |
| 500 | |
| 501 // Called to verify that a class can link during initialization, without | |
| 502 // throwing a VerifyError. | |
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503 bool InstanceKlass::link_class_or_fail(TRAPS) { |
| 0 | 504 assert(is_loaded(), "must be loaded"); |
| 505 if (!is_linked()) { | |
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506 HandleMark hm(THREAD); |
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507 instanceKlassHandle this_oop(THREAD, this); |
| 0 | 508 link_class_impl(this_oop, false, CHECK_false); |
| 509 } | |
| 510 return is_linked(); | |
| 511 } | |
| 512 | |
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513 bool InstanceKlass::link_class_impl( |
| 0 | 514 instanceKlassHandle this_oop, bool throw_verifyerror, TRAPS) { |
| 515 // check for error state | |
| 516 if (this_oop->is_in_error_state()) { | |
| 517 ResourceMark rm(THREAD); | |
| 518 THROW_MSG_(vmSymbols::java_lang_NoClassDefFoundError(), | |
| 519 this_oop->external_name(), false); | |
| 520 } | |
| 521 // return if already verified | |
| 522 if (this_oop->is_linked()) { | |
| 523 return true; | |
| 524 } | |
| 525 | |
| 526 // Timing | |
| 527 // timer handles recursion | |
| 528 assert(THREAD->is_Java_thread(), "non-JavaThread in link_class_impl"); | |
| 529 JavaThread* jt = (JavaThread*)THREAD; | |
| 530 | |
| 531 // link super class before linking this class | |
| 532 instanceKlassHandle super(THREAD, this_oop->super()); | |
| 533 if (super.not_null()) { | |
| 534 if (super->is_interface()) { // check if super class is an interface | |
| 535 ResourceMark rm(THREAD); | |
| 536 Exceptions::fthrow( | |
| 537 THREAD_AND_LOCATION, | |
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538 vmSymbols::java_lang_IncompatibleClassChangeError(), |
| 0 | 539 "class %s has interface %s as super class", |
| 540 this_oop->external_name(), | |
| 541 super->external_name() | |
| 542 ); | |
| 543 return false; | |
| 544 } | |
| 545 | |
| 546 link_class_impl(super, throw_verifyerror, CHECK_false); | |
| 547 } | |
| 548 | |
| 549 // link all interfaces implemented by this class before linking this class | |
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550 Array<Klass*>* interfaces = this_oop->local_interfaces(); |
| 0 | 551 int num_interfaces = interfaces->length(); |
| 552 for (int index = 0; index < num_interfaces; index++) { | |
| 553 HandleMark hm(THREAD); | |
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554 instanceKlassHandle ih(THREAD, interfaces->at(index)); |
| 0 | 555 link_class_impl(ih, throw_verifyerror, CHECK_false); |
| 556 } | |
| 557 | |
| 558 // in case the class is linked in the process of linking its superclasses | |
| 559 if (this_oop->is_linked()) { | |
| 560 return true; | |
| 561 } | |
| 562 | |
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563 // trace only the link time for this klass that includes |
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564 // the verification time |
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565 PerfClassTraceTime vmtimer(ClassLoader::perf_class_link_time(), |
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566 ClassLoader::perf_class_link_selftime(), |
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567 ClassLoader::perf_classes_linked(), |
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568 jt->get_thread_stat()->perf_recursion_counts_addr(), |
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569 jt->get_thread_stat()->perf_timers_addr(), |
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570 PerfClassTraceTime::CLASS_LINK); |
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571 |
| 0 | 572 // verification & rewriting |
| 573 { | |
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574 volatile oop init_lock = this_oop->init_lock(); |
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575 ObjectLocker ol(init_lock, THREAD, init_lock != NULL); |
| 0 | 576 // rewritten will have been set if loader constraint error found |
| 577 // on an earlier link attempt | |
| 578 // don't verify or rewrite if already rewritten | |
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579 |
| 0 | 580 if (!this_oop->is_linked()) { |
| 581 if (!this_oop->is_rewritten()) { | |
| 582 { | |
| 583 // Timer includes any side effects of class verification (resolution, | |
| 584 // etc), but not recursive entry into verify_code(). | |
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585 PerfClassTraceTime timer(ClassLoader::perf_class_verify_time(), |
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586 ClassLoader::perf_class_verify_selftime(), |
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587 ClassLoader::perf_classes_verified(), |
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588 jt->get_thread_stat()->perf_recursion_counts_addr(), |
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589 jt->get_thread_stat()->perf_timers_addr(), |
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590 PerfClassTraceTime::CLASS_VERIFY); |
| 0 | 591 bool verify_ok = verify_code(this_oop, throw_verifyerror, THREAD); |
| 592 if (!verify_ok) { | |
| 593 return false; | |
| 594 } | |
| 595 } | |
| 596 | |
| 597 // Just in case a side-effect of verify linked this class already | |
| 598 // (which can sometimes happen since the verifier loads classes | |
| 599 // using custom class loaders, which are free to initialize things) | |
| 600 if (this_oop->is_linked()) { | |
| 601 return true; | |
| 602 } | |
| 603 | |
| 604 // also sets rewritten | |
| 605 this_oop->rewrite_class(CHECK_false); | |
| 606 } | |
| 607 | |
| 3404 | 608 // relocate jsrs and link methods after they are all rewritten |
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609 this_oop->link_methods(CHECK_false); |
| 3404 | 610 |
| 0 | 611 // Initialize the vtable and interface table after |
| 612 // methods have been rewritten since rewrite may | |
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613 // fabricate new Method*s. |
| 0 | 614 // also does loader constraint checking |
| 615 if (!this_oop()->is_shared()) { | |
| 616 ResourceMark rm(THREAD); | |
| 617 this_oop->vtable()->initialize_vtable(true, CHECK_false); | |
| 618 this_oop->itable()->initialize_itable(true, CHECK_false); | |
| 619 } | |
| 620 #ifdef ASSERT | |
| 621 else { | |
| 622 ResourceMark rm(THREAD); | |
| 623 this_oop->vtable()->verify(tty, true); | |
| 624 // In case itable verification is ever added. | |
| 625 // this_oop->itable()->verify(tty, true); | |
| 626 } | |
| 627 #endif | |
| 628 this_oop->set_init_state(linked); | |
| 629 if (JvmtiExport::should_post_class_prepare()) { | |
| 630 Thread *thread = THREAD; | |
| 631 assert(thread->is_Java_thread(), "thread->is_Java_thread()"); | |
| 632 JvmtiExport::post_class_prepare((JavaThread *) thread, this_oop()); | |
| 633 } | |
| 634 } | |
| 635 } | |
| 636 return true; | |
| 637 } | |
| 638 | |
| 639 | |
| 640 // Rewrite the byte codes of all of the methods of a class. | |
| 641 // The rewriter must be called exactly once. Rewriting must happen after | |
| 642 // verification but before the first method of the class is executed. | |
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643 void InstanceKlass::rewrite_class(TRAPS) { |
| 0 | 644 assert(is_loaded(), "must be loaded"); |
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645 instanceKlassHandle this_oop(THREAD, this); |
| 0 | 646 if (this_oop->is_rewritten()) { |
| 647 assert(this_oop()->is_shared(), "rewriting an unshared class?"); | |
| 648 return; | |
| 649 } | |
| 3404 | 650 Rewriter::rewrite(this_oop, CHECK); |
| 0 | 651 this_oop->set_rewritten(); |
| 652 } | |
| 653 | |
| 3404 | 654 // Now relocate and link method entry points after class is rewritten. |
| 655 // This is outside is_rewritten flag. In case of an exception, it can be | |
| 656 // executed more than once. | |
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657 void InstanceKlass::link_methods(TRAPS) { |
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658 int len = methods()->length(); |
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659 for (int i = len-1; i >= 0; i--) { |
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660 methodHandle m(THREAD, methods()->at(i)); |
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661 |
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662 // Set up method entry points for compiler and interpreter . |
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663 m->link_method(m, CHECK); |
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664 |
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665 // This is for JVMTI and unrelated to relocator but the last thing we do |
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666 #ifdef ASSERT |
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667 if (StressMethodComparator) { |
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668 ResourceMark rm(THREAD); |
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669 static int nmc = 0; |
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670 for (int j = i; j >= 0 && j >= i-4; j--) { |
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671 if ((++nmc % 1000) == 0) tty->print_cr("Have run MethodComparator %d times...", nmc); |
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672 bool z = MethodComparator::methods_EMCP(m(), |
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673 methods()->at(j)); |
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674 if (j == i && !z) { |
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675 tty->print("MethodComparator FAIL: "); m->print(); m->print_codes(); |
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676 assert(z, "method must compare equal to itself"); |
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677 } |
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678 } |
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679 } |
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680 #endif //ASSERT |
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681 } |
| 3404 | 682 } |
| 683 | |
| 0 | 684 |
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685 void InstanceKlass::initialize_impl(instanceKlassHandle this_oop, TRAPS) { |
| 0 | 686 // Make sure klass is linked (verified) before initialization |
| 687 // A class could already be verified, since it has been reflected upon. | |
| 688 this_oop->link_class(CHECK); | |
| 689 | |
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690 DTRACE_CLASSINIT_PROBE(required, InstanceKlass::cast(this_oop()), -1); |
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691 |
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692 bool wait = false; |
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693 |
| 0 | 694 // refer to the JVM book page 47 for description of steps |
| 695 // Step 1 | |
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696 { |
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697 volatile oop init_lock = this_oop->init_lock(); |
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698 ObjectLocker ol(init_lock, THREAD, init_lock != NULL); |
| 0 | 699 |
| 700 Thread *self = THREAD; // it's passed the current thread | |
| 701 | |
| 702 // Step 2 | |
| 703 // If we were to use wait() instead of waitInterruptibly() then | |
| 704 // we might end up throwing IE from link/symbol resolution sites | |
| 705 // that aren't expected to throw. This would wreak havoc. See 6320309. | |
| 706 while(this_oop->is_being_initialized() && !this_oop->is_reentrant_initialization(self)) { | |
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707 wait = true; |
| 0 | 708 ol.waitUninterruptibly(CHECK); |
| 709 } | |
| 710 | |
| 711 // Step 3 | |
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712 if (this_oop->is_being_initialized() && this_oop->is_reentrant_initialization(self)) { |
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713 DTRACE_CLASSINIT_PROBE_WAIT(recursive, InstanceKlass::cast(this_oop()), -1,wait); |
| 0 | 714 return; |
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715 } |
| 0 | 716 |
| 717 // Step 4 | |
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718 if (this_oop->is_initialized()) { |
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719 DTRACE_CLASSINIT_PROBE_WAIT(concurrent, InstanceKlass::cast(this_oop()), -1,wait); |
| 0 | 720 return; |
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721 } |
| 0 | 722 |
| 723 // Step 5 | |
| 724 if (this_oop->is_in_error_state()) { | |
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725 DTRACE_CLASSINIT_PROBE_WAIT(erroneous, InstanceKlass::cast(this_oop()), -1,wait); |
| 0 | 726 ResourceMark rm(THREAD); |
| 727 const char* desc = "Could not initialize class "; | |
| 728 const char* className = this_oop->external_name(); | |
| 729 size_t msglen = strlen(desc) + strlen(className) + 1; | |
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730 char* message = NEW_RESOURCE_ARRAY(char, msglen); |
| 0 | 731 if (NULL == message) { |
| 732 // Out of memory: can't create detailed error message | |
| 733 THROW_MSG(vmSymbols::java_lang_NoClassDefFoundError(), className); | |
| 734 } else { | |
| 735 jio_snprintf(message, msglen, "%s%s", desc, className); | |
| 736 THROW_MSG(vmSymbols::java_lang_NoClassDefFoundError(), message); | |
| 737 } | |
| 738 } | |
| 739 | |
| 740 // Step 6 | |
| 741 this_oop->set_init_state(being_initialized); | |
| 742 this_oop->set_init_thread(self); | |
| 743 } | |
| 744 | |
| 745 // Step 7 | |
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746 Klass* super_klass = this_oop->super(); |
| 6983 | 747 if (super_klass != NULL && !this_oop->is_interface() && super_klass->should_be_initialized()) { |
| 748 super_klass->initialize(THREAD); | |
| 0 | 749 |
| 750 if (HAS_PENDING_EXCEPTION) { | |
| 751 Handle e(THREAD, PENDING_EXCEPTION); | |
| 752 CLEAR_PENDING_EXCEPTION; | |
| 753 { | |
| 754 EXCEPTION_MARK; | |
| 755 this_oop->set_initialization_state_and_notify(initialization_error, THREAD); // Locks object, set state, and notify all waiting threads | |
| 756 CLEAR_PENDING_EXCEPTION; // ignore any exception thrown, superclass initialization error is thrown below | |
| 757 } | |
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758 DTRACE_CLASSINIT_PROBE_WAIT(super__failed, InstanceKlass::cast(this_oop()), -1,wait); |
| 0 | 759 THROW_OOP(e()); |
| 760 } | |
| 761 } | |
| 762 | |
| 6934 | 763 if (this_oop->has_default_methods()) { |
| 764 // Step 7.5: initialize any interfaces which have default methods | |
| 765 for (int i = 0; i < this_oop->local_interfaces()->length(); ++i) { | |
| 766 Klass* iface = this_oop->local_interfaces()->at(i); | |
| 767 InstanceKlass* ik = InstanceKlass::cast(iface); | |
| 768 if (ik->has_default_methods() && ik->should_be_initialized()) { | |
| 769 ik->initialize(THREAD); | |
| 770 | |
| 771 if (HAS_PENDING_EXCEPTION) { | |
| 772 Handle e(THREAD, PENDING_EXCEPTION); | |
| 773 CLEAR_PENDING_EXCEPTION; | |
| 774 { | |
| 775 EXCEPTION_MARK; | |
| 776 // Locks object, set state, and notify all waiting threads | |
| 777 this_oop->set_initialization_state_and_notify( | |
| 778 initialization_error, THREAD); | |
| 779 | |
| 780 // ignore any exception thrown, superclass initialization error is | |
| 781 // thrown below | |
| 782 CLEAR_PENDING_EXCEPTION; | |
| 783 } | |
| 784 DTRACE_CLASSINIT_PROBE_WAIT( | |
| 785 super__failed, InstanceKlass::cast(this_oop()), -1, wait); | |
| 786 THROW_OOP(e()); | |
| 787 } | |
| 788 } | |
| 789 } | |
| 790 } | |
| 791 | |
| 0 | 792 // Step 8 |
| 793 { | |
| 794 assert(THREAD->is_Java_thread(), "non-JavaThread in initialize_impl"); | |
| 795 JavaThread* jt = (JavaThread*)THREAD; | |
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796 DTRACE_CLASSINIT_PROBE_WAIT(clinit, InstanceKlass::cast(this_oop()), -1,wait); |
| 0 | 797 // Timer includes any side effects of class initialization (resolution, |
| 798 // etc), but not recursive entry into call_class_initializer(). | |
|
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799 PerfClassTraceTime timer(ClassLoader::perf_class_init_time(), |
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800 ClassLoader::perf_class_init_selftime(), |
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801 ClassLoader::perf_classes_inited(), |
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802 jt->get_thread_stat()->perf_recursion_counts_addr(), |
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803 jt->get_thread_stat()->perf_timers_addr(), |
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804 PerfClassTraceTime::CLASS_CLINIT); |
| 0 | 805 this_oop->call_class_initializer(THREAD); |
| 806 } | |
| 807 | |
| 808 // Step 9 | |
| 809 if (!HAS_PENDING_EXCEPTION) { | |
| 810 this_oop->set_initialization_state_and_notify(fully_initialized, CHECK); | |
| 811 { ResourceMark rm(THREAD); | |
| 812 debug_only(this_oop->vtable()->verify(tty, true);) | |
| 813 } | |
| 814 } | |
| 815 else { | |
| 816 // Step 10 and 11 | |
| 817 Handle e(THREAD, PENDING_EXCEPTION); | |
| 818 CLEAR_PENDING_EXCEPTION; | |
| 819 { | |
| 820 EXCEPTION_MARK; | |
| 821 this_oop->set_initialization_state_and_notify(initialization_error, THREAD); | |
| 822 CLEAR_PENDING_EXCEPTION; // ignore any exception thrown, class initialization error is thrown below | |
| 823 } | |
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824 DTRACE_CLASSINIT_PROBE_WAIT(error, InstanceKlass::cast(this_oop()), -1,wait); |
| 1142 | 825 if (e->is_a(SystemDictionary::Error_klass())) { |
| 0 | 826 THROW_OOP(e()); |
| 827 } else { | |
| 828 JavaCallArguments args(e); | |
|
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829 THROW_ARG(vmSymbols::java_lang_ExceptionInInitializerError(), |
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830 vmSymbols::throwable_void_signature(), |
| 0 | 831 &args); |
| 832 } | |
| 833 } | |
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834 DTRACE_CLASSINIT_PROBE_WAIT(end, InstanceKlass::cast(this_oop()), -1,wait); |
| 0 | 835 } |
| 836 | |
| 837 | |
| 838 // Note: implementation moved to static method to expose the this pointer. | |
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839 void InstanceKlass::set_initialization_state_and_notify(ClassState state, TRAPS) { |
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840 instanceKlassHandle kh(THREAD, this); |
| 0 | 841 set_initialization_state_and_notify_impl(kh, state, CHECK); |
| 842 } | |
| 843 | |
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844 void InstanceKlass::set_initialization_state_and_notify_impl(instanceKlassHandle this_oop, ClassState state, TRAPS) { |
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845 volatile oop init_lock = this_oop->init_lock(); |
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846 ObjectLocker ol(init_lock, THREAD, init_lock != NULL); |
| 0 | 847 this_oop->set_init_state(state); |
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848 this_oop->fence_and_clear_init_lock(); |
| 0 | 849 ol.notify_all(CHECK); |
| 850 } | |
| 851 | |
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852 // The embedded _implementor field can only record one implementor. |
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853 // When there are more than one implementors, the _implementor field |
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854 // is set to the interface Klass* itself. Following are the possible |
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855 // values for the _implementor field: |
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856 // NULL - no implementor |
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857 // implementor Klass* - one implementor |
|
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858 // self - more than one implementor |
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859 // |
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860 // The _implementor field only exists for interfaces. |
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861 void InstanceKlass::add_implementor(Klass* k) { |
| 0 | 862 assert(Compile_lock->owned_by_self(), ""); |
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863 assert(is_interface(), "not interface"); |
| 0 | 864 // Filter out my subinterfaces. |
| 865 // (Note: Interfaces are never on the subklass list.) | |
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866 if (InstanceKlass::cast(k)->is_interface()) return; |
| 0 | 867 |
| 868 // Filter out subclasses whose supers already implement me. | |
| 869 // (Note: CHA must walk subclasses of direct implementors | |
| 870 // in order to locate indirect implementors.) | |
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871 Klass* sk = InstanceKlass::cast(k)->super(); |
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872 if (sk != NULL && InstanceKlass::cast(sk)->implements_interface(this)) |
| 0 | 873 // We only need to check one immediate superclass, since the |
| 874 // implements_interface query looks at transitive_interfaces. | |
| 875 // Any supers of the super have the same (or fewer) transitive_interfaces. | |
| 876 return; | |
| 877 | |
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878 Klass* ik = implementor(); |
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879 if (ik == NULL) { |
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880 set_implementor(k); |
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881 } else if (ik != this) { |
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882 // There is already an implementor. Use itself as an indicator of |
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883 // more than one implementors. |
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884 set_implementor(this); |
| 0 | 885 } |
| 886 | |
| 887 // The implementor also implements the transitive_interfaces | |
| 888 for (int index = 0; index < local_interfaces()->length(); index++) { | |
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889 InstanceKlass::cast(local_interfaces()->at(index))->add_implementor(k); |
| 0 | 890 } |
| 891 } | |
| 892 | |
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893 void InstanceKlass::init_implementor() { |
|
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894 if (is_interface()) { |
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895 set_implementor(NULL); |
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896 } |
| 0 | 897 } |
| 898 | |
| 899 | |
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900 void InstanceKlass::process_interfaces(Thread *thread) { |
| 0 | 901 // link this class into the implementors list of every interface it implements |
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902 Klass* this_as_klass_oop = this; |
| 0 | 903 for (int i = local_interfaces()->length() - 1; i >= 0; i--) { |
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904 assert(local_interfaces()->at(i)->is_klass(), "must be a klass"); |
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905 InstanceKlass* interf = InstanceKlass::cast(local_interfaces()->at(i)); |
| 0 | 906 assert(interf->is_interface(), "expected interface"); |
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907 interf->add_implementor(this_as_klass_oop); |
| 0 | 908 } |
| 909 } | |
| 910 | |
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911 bool InstanceKlass::can_be_primary_super_slow() const { |
| 0 | 912 if (is_interface()) |
| 913 return false; | |
| 914 else | |
| 915 return Klass::can_be_primary_super_slow(); | |
| 916 } | |
| 917 | |
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918 GrowableArray<Klass*>* InstanceKlass::compute_secondary_supers(int num_extra_slots) { |
| 0 | 919 // The secondaries are the implemented interfaces. |
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920 InstanceKlass* ik = InstanceKlass::cast(this); |
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921 Array<Klass*>* interfaces = ik->transitive_interfaces(); |
| 0 | 922 int num_secondaries = num_extra_slots + interfaces->length(); |
| 923 if (num_secondaries == 0) { | |
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924 // Must share this for correct bootstrapping! |
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925 set_secondary_supers(Universe::the_empty_klass_array()); |
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926 return NULL; |
| 0 | 927 } else if (num_extra_slots == 0) { |
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928 // The secondary super list is exactly the same as the transitive interfaces. |
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929 // Redefine classes has to be careful not to delete this! |
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930 set_secondary_supers(interfaces); |
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931 return NULL; |
| 0 | 932 } else { |
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933 // Copy transitive interfaces to a temporary growable array to be constructed |
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934 // into the secondary super list with extra slots. |
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935 GrowableArray<Klass*>* secondaries = new GrowableArray<Klass*>(interfaces->length()); |
| 0 | 936 for (int i = 0; i < interfaces->length(); i++) { |
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937 secondaries->push(interfaces->at(i)); |
| 0 | 938 } |
| 939 return secondaries; | |
| 940 } | |
| 941 } | |
| 942 | |
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943 bool InstanceKlass::compute_is_subtype_of(Klass* k) { |
| 6983 | 944 if (k->is_interface()) { |
| 0 | 945 return implements_interface(k); |
| 946 } else { | |
| 947 return Klass::compute_is_subtype_of(k); | |
| 948 } | |
| 949 } | |
| 950 | |
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951 bool InstanceKlass::implements_interface(Klass* k) const { |
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952 if (this == k) return true; |
| 6983 | 953 assert(k->is_interface(), "should be an interface class"); |
| 0 | 954 for (int i = 0; i < transitive_interfaces()->length(); i++) { |
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955 if (transitive_interfaces()->at(i) == k) { |
| 0 | 956 return true; |
| 957 } | |
| 958 } | |
| 959 return false; | |
| 960 } | |
| 961 | |
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962 objArrayOop InstanceKlass::allocate_objArray(int n, int length, TRAPS) { |
| 0 | 963 if (length < 0) THROW_0(vmSymbols::java_lang_NegativeArraySizeException()); |
| 964 if (length > arrayOopDesc::max_array_length(T_OBJECT)) { | |
|
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965 report_java_out_of_memory("Requested array size exceeds VM limit"); |
|
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966 JvmtiExport::post_array_size_exhausted(); |
| 0 | 967 THROW_OOP_0(Universe::out_of_memory_error_array_size()); |
| 968 } | |
| 969 int size = objArrayOopDesc::object_size(length); | |
|
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970 Klass* ak = array_klass(n, CHECK_NULL); |
| 0 | 971 KlassHandle h_ak (THREAD, ak); |
| 972 objArrayOop o = | |
| 973 (objArrayOop)CollectedHeap::array_allocate(h_ak, size, length, CHECK_NULL); | |
| 974 return o; | |
| 975 } | |
| 976 | |
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977 instanceOop InstanceKlass::register_finalizer(instanceOop i, TRAPS) { |
| 0 | 978 if (TraceFinalizerRegistration) { |
| 979 tty->print("Registered "); | |
| 980 i->print_value_on(tty); | |
| 981 tty->print_cr(" (" INTPTR_FORMAT ") as finalizable", (address)i); | |
| 982 } | |
| 983 instanceHandle h_i(THREAD, i); | |
| 984 // Pass the handle as argument, JavaCalls::call expects oop as jobjects | |
| 985 JavaValue result(T_VOID); | |
| 986 JavaCallArguments args(h_i); | |
| 987 methodHandle mh (THREAD, Universe::finalizer_register_method()); | |
| 988 JavaCalls::call(&result, mh, &args, CHECK_NULL); | |
| 989 return h_i(); | |
| 990 } | |
| 991 | |
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992 instanceOop InstanceKlass::allocate_instance(TRAPS) { |
| 0 | 993 bool has_finalizer_flag = has_finalizer(); // Query before possible GC |
| 994 int size = size_helper(); // Query before forming handle. | |
| 995 | |
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996 KlassHandle h_k(THREAD, this); |
| 0 | 997 |
| 998 instanceOop i; | |
| 999 | |
| 1000 i = (instanceOop)CollectedHeap::obj_allocate(h_k, size, CHECK_NULL); | |
| 1001 if (has_finalizer_flag && !RegisterFinalizersAtInit) { | |
| 1002 i = register_finalizer(i, CHECK_NULL); | |
| 1003 } | |
| 1004 return i; | |
| 1005 } | |
| 1006 | |
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1007 void InstanceKlass::check_valid_for_instantiation(bool throwError, TRAPS) { |
| 0 | 1008 if (is_interface() || is_abstract()) { |
| 1009 ResourceMark rm(THREAD); | |
| 1010 THROW_MSG(throwError ? vmSymbols::java_lang_InstantiationError() | |
| 1011 : vmSymbols::java_lang_InstantiationException(), external_name()); | |
| 1012 } | |
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1013 if (this == SystemDictionary::Class_klass()) { |
| 0 | 1014 ResourceMark rm(THREAD); |
| 1015 THROW_MSG(throwError ? vmSymbols::java_lang_IllegalAccessError() | |
| 1016 : vmSymbols::java_lang_IllegalAccessException(), external_name()); | |
| 1017 } | |
| 1018 } | |
| 1019 | |
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1020 Klass* InstanceKlass::array_klass_impl(bool or_null, int n, TRAPS) { |
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1021 instanceKlassHandle this_oop(THREAD, this); |
| 0 | 1022 return array_klass_impl(this_oop, or_null, n, THREAD); |
| 1023 } | |
| 1024 | |
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1025 Klass* InstanceKlass::array_klass_impl(instanceKlassHandle this_oop, bool or_null, int n, TRAPS) { |
| 0 | 1026 if (this_oop->array_klasses() == NULL) { |
| 1027 if (or_null) return NULL; | |
| 1028 | |
| 1029 ResourceMark rm; | |
| 1030 JavaThread *jt = (JavaThread *)THREAD; | |
| 1031 { | |
| 1032 // Atomic creation of array_klasses | |
| 1033 MutexLocker mc(Compile_lock, THREAD); // for vtables | |
| 1034 MutexLocker ma(MultiArray_lock, THREAD); | |
| 1035 | |
| 1036 // Check if update has already taken place | |
| 1037 if (this_oop->array_klasses() == NULL) { | |
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1038 Klass* k = ObjArrayKlass::allocate_objArray_klass(this_oop->class_loader_data(), 1, this_oop, CHECK_NULL); |
| 0 | 1039 this_oop->set_array_klasses(k); |
| 1040 } | |
| 1041 } | |
| 1042 } | |
| 1043 // _this will always be set at this point | |
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1044 ObjArrayKlass* oak = (ObjArrayKlass*)this_oop->array_klasses(); |
| 0 | 1045 if (or_null) { |
| 1046 return oak->array_klass_or_null(n); | |
| 1047 } | |
| 1048 return oak->array_klass(n, CHECK_NULL); | |
| 1049 } | |
| 1050 | |
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1051 Klass* InstanceKlass::array_klass_impl(bool or_null, TRAPS) { |
| 0 | 1052 return array_klass_impl(or_null, 1, THREAD); |
| 1053 } | |
| 1054 | |
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1055 void InstanceKlass::call_class_initializer(TRAPS) { |
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1056 instanceKlassHandle ik (THREAD, this); |
| 0 | 1057 call_class_initializer_impl(ik, THREAD); |
| 1058 } | |
| 1059 | |
| 1060 static int call_class_initializer_impl_counter = 0; // for debugging | |
| 1061 | |
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1062 Method* InstanceKlass::class_initializer() { |
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1063 Method* clinit = find_method( |
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1064 vmSymbols::class_initializer_name(), vmSymbols::void_method_signature()); |
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1065 if (clinit != NULL && clinit->has_valid_initializer_flags()) { |
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1066 return clinit; |
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1067 } |
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1068 return NULL; |
| 0 | 1069 } |
| 1070 | |
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1071 void InstanceKlass::call_class_initializer_impl(instanceKlassHandle this_oop, TRAPS) { |
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1072 if (ReplayCompiles && |
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1073 (ReplaySuppressInitializers == 1 || |
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1074 ReplaySuppressInitializers >= 2 && this_oop->class_loader() != NULL)) { |
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1075 // Hide the existence of the initializer for the purpose of replaying the compile |
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1076 return; |
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1077 } |
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1078 |
| 0 | 1079 methodHandle h_method(THREAD, this_oop->class_initializer()); |
| 1080 assert(!this_oop->is_initialized(), "we cannot initialize twice"); | |
| 1081 if (TraceClassInitialization) { | |
| 1082 tty->print("%d Initializing ", call_class_initializer_impl_counter++); | |
| 1083 this_oop->name()->print_value(); | |
| 1084 tty->print_cr("%s (" INTPTR_FORMAT ")", h_method() == NULL ? "(no method)" : "", (address)this_oop()); | |
| 1085 } | |
| 1086 if (h_method() != NULL) { | |
| 1087 JavaCallArguments args; // No arguments | |
| 1088 JavaValue result(T_VOID); | |
| 1089 JavaCalls::call(&result, h_method, &args, CHECK); // Static call (no args) | |
| 1090 } | |
| 1091 } | |
| 1092 | |
| 1093 | |
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1094 void InstanceKlass::mask_for(methodHandle method, int bci, |
| 0 | 1095 InterpreterOopMap* entry_for) { |
| 1096 // Dirty read, then double-check under a lock. | |
| 1097 if (_oop_map_cache == NULL) { | |
| 1098 // Otherwise, allocate a new one. | |
| 1099 MutexLocker x(OopMapCacheAlloc_lock); | |
| 1100 // First time use. Allocate a cache in C heap | |
| 1101 if (_oop_map_cache == NULL) { | |
| 1102 _oop_map_cache = new OopMapCache(); | |
| 1103 } | |
| 1104 } | |
| 1105 // _oop_map_cache is constant after init; lookup below does is own locking. | |
| 1106 _oop_map_cache->lookup(method, bci, entry_for); | |
| 1107 } | |
| 1108 | |
| 1109 | |
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1110 bool InstanceKlass::find_local_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const { |
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1111 for (JavaFieldStream fs(this); !fs.done(); fs.next()) { |
| 3938 | 1112 Symbol* f_name = fs.name(); |
| 1113 Symbol* f_sig = fs.signature(); | |
| 0 | 1114 if (f_name == name && f_sig == sig) { |
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1115 fd->initialize(const_cast<InstanceKlass*>(this), fs.index()); |
| 0 | 1116 return true; |
| 1117 } | |
| 1118 } | |
| 1119 return false; | |
| 1120 } | |
| 1121 | |
| 1122 | |
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1123 Klass* InstanceKlass::find_interface_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const { |
| 0 | 1124 const int n = local_interfaces()->length(); |
| 1125 for (int i = 0; i < n; i++) { | |
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1126 Klass* intf1 = local_interfaces()->at(i); |
| 6983 | 1127 assert(intf1->is_interface(), "just checking type"); |
| 0 | 1128 // search for field in current interface |
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1129 if (InstanceKlass::cast(intf1)->find_local_field(name, sig, fd)) { |
| 0 | 1130 assert(fd->is_static(), "interface field must be static"); |
| 1131 return intf1; | |
| 1132 } | |
| 1133 // search for field in direct superinterfaces | |
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1134 Klass* intf2 = InstanceKlass::cast(intf1)->find_interface_field(name, sig, fd); |
| 0 | 1135 if (intf2 != NULL) return intf2; |
| 1136 } | |
| 1137 // otherwise field lookup fails | |
| 1138 return NULL; | |
| 1139 } | |
| 1140 | |
| 1141 | |
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1142 Klass* InstanceKlass::find_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const { |
| 0 | 1143 // search order according to newest JVM spec (5.4.3.2, p.167). |
| 1144 // 1) search for field in current klass | |
| 1145 if (find_local_field(name, sig, fd)) { | |
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1146 return const_cast<InstanceKlass*>(this); |
| 0 | 1147 } |
| 1148 // 2) search for field recursively in direct superinterfaces | |
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1149 { Klass* intf = find_interface_field(name, sig, fd); |
| 0 | 1150 if (intf != NULL) return intf; |
| 1151 } | |
| 1152 // 3) apply field lookup recursively if superclass exists | |
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1153 { Klass* supr = super(); |
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1154 if (supr != NULL) return InstanceKlass::cast(supr)->find_field(name, sig, fd); |
| 0 | 1155 } |
| 1156 // 4) otherwise field lookup fails | |
| 1157 return NULL; | |
| 1158 } | |
| 1159 | |
| 1160 | |
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1161 Klass* InstanceKlass::find_field(Symbol* name, Symbol* sig, bool is_static, fieldDescriptor* fd) const { |
| 0 | 1162 // search order according to newest JVM spec (5.4.3.2, p.167). |
| 1163 // 1) search for field in current klass | |
| 1164 if (find_local_field(name, sig, fd)) { | |
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1165 if (fd->is_static() == is_static) return const_cast<InstanceKlass*>(this); |
| 0 | 1166 } |
| 1167 // 2) search for field recursively in direct superinterfaces | |
| 1168 if (is_static) { | |
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1169 Klass* intf = find_interface_field(name, sig, fd); |
| 0 | 1170 if (intf != NULL) return intf; |
| 1171 } | |
| 1172 // 3) apply field lookup recursively if superclass exists | |
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1173 { Klass* supr = super(); |
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1174 if (supr != NULL) return InstanceKlass::cast(supr)->find_field(name, sig, is_static, fd); |
| 0 | 1175 } |
| 1176 // 4) otherwise field lookup fails | |
| 1177 return NULL; | |
| 1178 } | |
| 1179 | |
| 1180 | |
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1181 bool InstanceKlass::find_local_field_from_offset(int offset, bool is_static, fieldDescriptor* fd) const { |
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1182 for (JavaFieldStream fs(this); !fs.done(); fs.next()) { |
| 3938 | 1183 if (fs.offset() == offset) { |
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1184 fd->initialize(const_cast<InstanceKlass*>(this), fs.index()); |
| 0 | 1185 if (fd->is_static() == is_static) return true; |
| 1186 } | |
| 1187 } | |
| 1188 return false; | |
| 1189 } | |
| 1190 | |
| 1191 | |
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1192 bool InstanceKlass::find_field_from_offset(int offset, bool is_static, fieldDescriptor* fd) const { |
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1193 Klass* klass = const_cast<InstanceKlass*>(this); |
| 0 | 1194 while (klass != NULL) { |
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1195 if (InstanceKlass::cast(klass)->find_local_field_from_offset(offset, is_static, fd)) { |
| 0 | 1196 return true; |
| 1197 } | |
| 6983 | 1198 klass = klass->super(); |
| 0 | 1199 } |
| 1200 return false; | |
| 1201 } | |
| 1202 | |
| 1203 | |
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1204 void InstanceKlass::methods_do(void f(Method* method)) { |
| 0 | 1205 int len = methods()->length(); |
| 1206 for (int index = 0; index < len; index++) { | |
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1207 Method* m = methods()->at(index); |
| 0 | 1208 assert(m->is_method(), "must be method"); |
| 1209 f(m); | |
| 1210 } | |
| 1211 } | |
| 1212 | |
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1213 |
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1214 void InstanceKlass::do_local_static_fields(FieldClosure* cl) { |
| 3938 | 1215 for (JavaFieldStream fs(this); !fs.done(); fs.next()) { |
| 1216 if (fs.access_flags().is_static()) { | |
| 1217 fieldDescriptor fd; | |
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1218 fd.initialize(this, fs.index()); |
| 3938 | 1219 cl->do_field(&fd); |
| 1220 } | |
| 0 | 1221 } |
| 1222 } | |
| 1223 | |
| 1224 | |
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1225 void InstanceKlass::do_local_static_fields(void f(fieldDescriptor*, TRAPS), TRAPS) { |
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1226 instanceKlassHandle h_this(THREAD, this); |
| 0 | 1227 do_local_static_fields_impl(h_this, f, CHECK); |
| 1228 } | |
| 1229 | |
| 1230 | |
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1231 void InstanceKlass::do_local_static_fields_impl(instanceKlassHandle this_oop, void f(fieldDescriptor* fd, TRAPS), TRAPS) { |
| 3938 | 1232 for (JavaFieldStream fs(this_oop()); !fs.done(); fs.next()) { |
| 1233 if (fs.access_flags().is_static()) { | |
| 1234 fieldDescriptor fd; | |
| 1235 fd.initialize(this_oop(), fs.index()); | |
| 1236 f(&fd, CHECK); | |
| 1237 } | |
| 0 | 1238 } |
| 1239 } | |
| 1240 | |
| 1241 | |
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1242 static int compare_fields_by_offset(int* a, int* b) { |
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1243 return a[0] - b[0]; |
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1244 } |
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1245 |
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1246 void InstanceKlass::do_nonstatic_fields(FieldClosure* cl) { |
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1247 InstanceKlass* super = superklass(); |
| 0 | 1248 if (super != NULL) { |
| 1249 super->do_nonstatic_fields(cl); | |
| 1250 } | |
|
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1251 fieldDescriptor fd; |
| 3938 | 1252 int length = java_fields_count(); |
|
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1253 // In DebugInfo nonstatic fields are sorted by offset. |
| 6197 | 1254 int* fields_sorted = NEW_C_HEAP_ARRAY(int, 2*(length+1), mtClass); |
|
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1255 int j = 0; |
| 3938 | 1256 for (int i = 0; i < length; i += 1) { |
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1257 fd.initialize(this, i); |
|
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1258 if (!fd.is_static()) { |
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1259 fields_sorted[j + 0] = fd.offset(); |
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1260 fields_sorted[j + 1] = i; |
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1261 j += 2; |
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1262 } |
| 0 | 1263 } |
|
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1264 if (j > 0) { |
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1265 length = j; |
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1266 // _sort_Fn is defined in growableArray.hpp. |
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1267 qsort(fields_sorted, length/2, 2*sizeof(int), (_sort_Fn)compare_fields_by_offset); |
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1268 for (int i = 0; i < length; i += 2) { |
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1269 fd.initialize(this, fields_sorted[i + 1]); |
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1270 assert(!fd.is_static() && fd.offset() == fields_sorted[i], "only nonstatic fields"); |
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1271 cl->do_field(&fd); |
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1272 } |
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1273 } |
| 6197 | 1274 FREE_C_HEAP_ARRAY(int, fields_sorted, mtClass); |
| 0 | 1275 } |
| 1276 | |
| 1277 | |
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1278 void InstanceKlass::array_klasses_do(void f(Klass* k, TRAPS), TRAPS) { |
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1279 if (array_klasses() != NULL) |
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1280 ArrayKlass::cast(array_klasses())->array_klasses_do(f, THREAD); |
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1281 } |
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1282 |
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1283 void InstanceKlass::array_klasses_do(void f(Klass* k)) { |
| 0 | 1284 if (array_klasses() != NULL) |
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1285 ArrayKlass::cast(array_klasses())->array_klasses_do(f); |
| 0 | 1286 } |
| 1287 | |
| 1288 | |
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1289 void InstanceKlass::with_array_klasses_do(void f(Klass* k)) { |
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1290 f(this); |
| 0 | 1291 array_klasses_do(f); |
| 1292 } | |
| 1293 | |
| 1294 #ifdef ASSERT | |
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1295 static int linear_search(Array<Method*>* methods, Symbol* name, Symbol* signature) { |
| 0 | 1296 int len = methods->length(); |
| 1297 for (int index = 0; index < len; index++) { | |
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1298 Method* m = methods->at(index); |
| 0 | 1299 assert(m->is_method(), "must be method"); |
| 1300 if (m->signature() == signature && m->name() == name) { | |
| 1301 return index; | |
| 1302 } | |
| 1303 } | |
| 1304 return -1; | |
| 1305 } | |
| 1306 #endif | |
| 1307 | |
| 6934 | 1308 static int binary_search(Array<Method*>* methods, Symbol* name) { |
| 0 | 1309 int len = methods->length(); |
| 1310 // methods are sorted, so do binary search | |
| 1311 int l = 0; | |
| 1312 int h = len - 1; | |
| 1313 while (l <= h) { | |
| 1314 int mid = (l + h) >> 1; | |
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1315 Method* m = methods->at(mid); |
| 0 | 1316 assert(m->is_method(), "must be method"); |
| 1317 int res = m->name()->fast_compare(name); | |
| 1318 if (res == 0) { | |
| 6934 | 1319 return mid; |
| 0 | 1320 } else if (res < 0) { |
| 1321 l = mid + 1; | |
| 1322 } else { | |
| 1323 h = mid - 1; | |
| 1324 } | |
| 1325 } | |
| 6934 | 1326 return -1; |
| 1327 } | |
| 1328 | |
| 1329 Method* InstanceKlass::find_method(Symbol* name, Symbol* signature) const { | |
| 1330 return InstanceKlass::find_method(methods(), name, signature); | |
| 1331 } | |
| 1332 | |
| 1333 Method* InstanceKlass::find_method( | |
| 1334 Array<Method*>* methods, Symbol* name, Symbol* signature) { | |
| 1335 int hit = binary_search(methods, name); | |
| 1336 if (hit != -1) { | |
| 1337 Method* m = methods->at(hit); | |
| 1338 // Do linear search to find matching signature. First, quick check | |
| 1339 // for common case | |
| 1340 if (m->signature() == signature) return m; | |
| 1341 // search downwards through overloaded methods | |
| 1342 int i; | |
| 1343 for (i = hit - 1; i >= 0; --i) { | |
| 1344 Method* m = methods->at(i); | |
| 1345 assert(m->is_method(), "must be method"); | |
| 1346 if (m->name() != name) break; | |
| 1347 if (m->signature() == signature) return m; | |
| 1348 } | |
| 1349 // search upwards | |
| 1350 for (i = hit + 1; i < methods->length(); ++i) { | |
| 1351 Method* m = methods->at(i); | |
| 1352 assert(m->is_method(), "must be method"); | |
| 1353 if (m->name() != name) break; | |
| 1354 if (m->signature() == signature) return m; | |
| 1355 } | |
| 1356 // not found | |
| 0 | 1357 #ifdef ASSERT |
| 6934 | 1358 int index = linear_search(methods, name, signature); |
| 1359 assert(index == -1, err_msg("binary search should have found entry %d", index)); | |
| 0 | 1360 #endif |
| 6934 | 1361 } |
| 0 | 1362 return NULL; |
| 1363 } | |
| 1364 | |
| 6934 | 1365 int InstanceKlass::find_method_by_name(Symbol* name, int* end) { |
| 1366 return find_method_by_name(methods(), name, end); | |
| 1367 } | |
| 1368 | |
| 1369 int InstanceKlass::find_method_by_name( | |
| 1370 Array<Method*>* methods, Symbol* name, int* end_ptr) { | |
| 1371 assert(end_ptr != NULL, "just checking"); | |
| 1372 int start = binary_search(methods, name); | |
| 1373 int end = start + 1; | |
| 1374 if (start != -1) { | |
| 1375 while (start - 1 >= 0 && (methods->at(start - 1))->name() == name) --start; | |
| 1376 while (end < methods->length() && (methods->at(end))->name() == name) ++end; | |
| 1377 *end_ptr = end; | |
| 1378 return start; | |
| 1379 } | |
| 1380 return -1; | |
| 1381 } | |
| 1382 | |
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1383 Method* InstanceKlass::uncached_lookup_method(Symbol* name, Symbol* signature) const { |
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1384 Klass* klass = const_cast<InstanceKlass*>(this); |
| 0 | 1385 while (klass != NULL) { |
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1386 Method* method = InstanceKlass::cast(klass)->find_method(name, signature); |
| 0 | 1387 if (method != NULL) return method; |
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1388 klass = InstanceKlass::cast(klass)->super(); |
| 0 | 1389 } |
| 1390 return NULL; | |
| 1391 } | |
| 1392 | |
| 1393 // lookup a method in all the interfaces that this class implements | |
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1394 Method* InstanceKlass::lookup_method_in_all_interfaces(Symbol* name, |
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1395 Symbol* signature) const { |
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1396 Array<Klass*>* all_ifs = transitive_interfaces(); |
| 0 | 1397 int num_ifs = all_ifs->length(); |
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1398 InstanceKlass *ik = NULL; |
| 0 | 1399 for (int i = 0; i < num_ifs; i++) { |
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1400 ik = InstanceKlass::cast(all_ifs->at(i)); |
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1401 Method* m = ik->lookup_method(name, signature); |
| 0 | 1402 if (m != NULL) { |
| 1403 return m; | |
| 1404 } | |
| 1405 } | |
| 1406 return NULL; | |
| 1407 } | |
| 1408 | |
| 1409 /* jni_id_for_impl for jfieldIds only */ | |
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1410 JNIid* InstanceKlass::jni_id_for_impl(instanceKlassHandle this_oop, int offset) { |
| 0 | 1411 MutexLocker ml(JfieldIdCreation_lock); |
| 1412 // Retry lookup after we got the lock | |
| 1413 JNIid* probe = this_oop->jni_ids() == NULL ? NULL : this_oop->jni_ids()->find(offset); | |
| 1414 if (probe == NULL) { | |
| 1415 // Slow case, allocate new static field identifier | |
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1416 probe = new JNIid(this_oop(), offset, this_oop->jni_ids()); |
| 0 | 1417 this_oop->set_jni_ids(probe); |
| 1418 } | |
| 1419 return probe; | |
| 1420 } | |
| 1421 | |
| 1422 | |
| 1423 /* jni_id_for for jfieldIds only */ | |
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1424 JNIid* InstanceKlass::jni_id_for(int offset) { |
| 0 | 1425 JNIid* probe = jni_ids() == NULL ? NULL : jni_ids()->find(offset); |
| 1426 if (probe == NULL) { | |
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1427 probe = jni_id_for_impl(this, offset); |
| 0 | 1428 } |
| 1429 return probe; | |
| 1430 } | |
| 1431 | |
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1432 u2 InstanceKlass::enclosing_method_data(int offset) { |
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1433 Array<jushort>* inner_class_list = inner_classes(); |
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1434 if (inner_class_list == NULL) { |
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1435 return 0; |
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1436 } |
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1437 int length = inner_class_list->length(); |
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1438 if (length % inner_class_next_offset == 0) { |
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1439 return 0; |
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1440 } else { |
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1441 int index = length - enclosing_method_attribute_size; |
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1442 assert(offset < enclosing_method_attribute_size, "invalid offset"); |
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1443 return inner_class_list->at(index + offset); |
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1444 } |
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1445 } |
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1446 |
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1447 void InstanceKlass::set_enclosing_method_indices(u2 class_index, |
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1448 u2 method_index) { |
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1449 Array<jushort>* inner_class_list = inner_classes(); |
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1450 assert (inner_class_list != NULL, "_inner_classes list is not set up"); |
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1451 int length = inner_class_list->length(); |
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1452 if (length % inner_class_next_offset == enclosing_method_attribute_size) { |
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1453 int index = length - enclosing_method_attribute_size; |
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1454 inner_class_list->at_put( |
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1455 index + enclosing_method_class_index_offset, class_index); |
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1456 inner_class_list->at_put( |
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1457 index + enclosing_method_method_index_offset, method_index); |
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1458 } |
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1459 } |
| 0 | 1460 |
| 1461 // Lookup or create a jmethodID. | |
|
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1462 // This code is called by the VMThread and JavaThreads so the |
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1463 // locking has to be done very carefully to avoid deadlocks |
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1464 // and/or other cache consistency problems. |
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1465 // |
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1466 jmethodID InstanceKlass::get_jmethod_id(instanceKlassHandle ik_h, methodHandle method_h) { |
| 0 | 1467 size_t idnum = (size_t)method_h->method_idnum(); |
| 1468 jmethodID* jmeths = ik_h->methods_jmethod_ids_acquire(); | |
| 1469 size_t length = 0; | |
| 1470 jmethodID id = NULL; | |
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1471 |
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1472 // We use a double-check locking idiom here because this cache is |
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1473 // performance sensitive. In the normal system, this cache only |
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1474 // transitions from NULL to non-NULL which is safe because we use |
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1475 // release_set_methods_jmethod_ids() to advertise the new cache. |
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1476 // A partially constructed cache should never be seen by a racing |
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1477 // thread. We also use release_store_ptr() to save a new jmethodID |
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1478 // in the cache so a partially constructed jmethodID should never be |
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1479 // seen either. Cache reads of existing jmethodIDs proceed without a |
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1480 // lock, but cache writes of a new jmethodID requires uniqueness and |
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1481 // creation of the cache itself requires no leaks so a lock is |
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1482 // generally acquired in those two cases. |
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1483 // |
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1484 // If the RedefineClasses() API has been used, then this cache can |
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1485 // grow and we'll have transitions from non-NULL to bigger non-NULL. |
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1486 // Cache creation requires no leaks and we require safety between all |
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1487 // cache accesses and freeing of the old cache so a lock is generally |
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1488 // acquired when the RedefineClasses() API has been used. |
| 0 | 1489 |
|
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1490 if (jmeths != NULL) { |
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1491 // the cache already exists |
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1492 if (!ik_h->idnum_can_increment()) { |
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1493 // the cache can't grow so we can just get the current values |
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1494 get_jmethod_id_length_value(jmeths, idnum, &length, &id); |
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1495 } else { |
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1496 // cache can grow so we have to be more careful |
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1497 if (Threads::number_of_threads() == 0 || |
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1498 SafepointSynchronize::is_at_safepoint()) { |
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1499 // we're single threaded or at a safepoint - no locking needed |
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1500 get_jmethod_id_length_value(jmeths, idnum, &length, &id); |
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1501 } else { |
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1502 MutexLocker ml(JmethodIdCreation_lock); |
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1503 get_jmethod_id_length_value(jmeths, idnum, &length, &id); |
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1504 } |
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1505 } |
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1506 } |
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1507 // implied else: |
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1508 // we need to allocate a cache so default length and id values are good |
| 0 | 1509 |
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1510 if (jmeths == NULL || // no cache yet |
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1511 length <= idnum || // cache is too short |
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1512 id == NULL) { // cache doesn't contain entry |
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1513 |
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1514 // This function can be called by the VMThread so we have to do all |
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1515 // things that might block on a safepoint before grabbing the lock. |
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1516 // Otherwise, we can deadlock with the VMThread or have a cache |
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1517 // consistency issue. These vars keep track of what we might have |
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1518 // to free after the lock is dropped. |
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1519 jmethodID to_dealloc_id = NULL; |
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1520 jmethodID* to_dealloc_jmeths = NULL; |
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1521 |
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1522 // may not allocate new_jmeths or use it if we allocate it |
| 0 | 1523 jmethodID* new_jmeths = NULL; |
| 1524 if (length <= idnum) { | |
|
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1525 // allocate a new cache that might be used |
| 0 | 1526 size_t size = MAX2(idnum+1, (size_t)ik_h->idnum_allocated_count()); |
| 6197 | 1527 new_jmeths = NEW_C_HEAP_ARRAY(jmethodID, size+1, mtClass); |
| 0 | 1528 memset(new_jmeths, 0, (size+1)*sizeof(jmethodID)); |
|
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1529 // cache size is stored in element[0], other elements offset by one |
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1530 new_jmeths[0] = (jmethodID)size; |
| 0 | 1531 } |
| 1532 | |
|
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1533 // allocate a new jmethodID that might be used |
| 0 | 1534 jmethodID new_id = NULL; |
| 1535 if (method_h->is_old() && !method_h->is_obsolete()) { | |
| 1536 // The method passed in is old (but not obsolete), we need to use the current version | |
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1537 Method* current_method = ik_h->method_with_idnum((int)idnum); |
| 0 | 1538 assert(current_method != NULL, "old and but not obsolete, so should exist"); |
|
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1539 new_id = Method::make_jmethod_id(ik_h->class_loader_data(), current_method); |
| 0 | 1540 } else { |
| 1541 // It is the current version of the method or an obsolete method, | |
| 1542 // use the version passed in | |
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1543 new_id = Method::make_jmethod_id(ik_h->class_loader_data(), method_h()); |
| 0 | 1544 } |
| 1545 | |
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1546 if (Threads::number_of_threads() == 0 || |
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1547 SafepointSynchronize::is_at_safepoint()) { |
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1548 // we're single threaded or at a safepoint - no locking needed |
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1549 id = get_jmethod_id_fetch_or_update(ik_h, idnum, new_id, new_jmeths, |
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1550 &to_dealloc_id, &to_dealloc_jmeths); |
|
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1551 } else { |
| 0 | 1552 MutexLocker ml(JmethodIdCreation_lock); |
|
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1553 id = get_jmethod_id_fetch_or_update(ik_h, idnum, new_id, new_jmeths, |
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1554 &to_dealloc_id, &to_dealloc_jmeths); |
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1555 } |
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1556 |
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1557 // The lock has been dropped so we can free resources. |
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1558 // Free up either the old cache or the new cache if we allocated one. |
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1559 if (to_dealloc_jmeths != NULL) { |
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1560 FreeHeap(to_dealloc_jmeths); |
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1561 } |
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1562 // free up the new ID since it wasn't needed |
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1563 if (to_dealloc_id != NULL) { |
|
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1564 Method::destroy_jmethod_id(ik_h->class_loader_data(), to_dealloc_id); |
|
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1565 } |
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1566 } |
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1567 return id; |
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1568 } |
| 0 | 1569 |
|
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1570 |
|
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1571 // Common code to fetch the jmethodID from the cache or update the |
|
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1572 // cache with the new jmethodID. This function should never do anything |
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1573 // that causes the caller to go to a safepoint or we can deadlock with |
|
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1574 // the VMThread or have cache consistency issues. |
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1575 // |
|
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1576 jmethodID InstanceKlass::get_jmethod_id_fetch_or_update( |
|
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1577 instanceKlassHandle ik_h, size_t idnum, jmethodID new_id, |
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1578 jmethodID* new_jmeths, jmethodID* to_dealloc_id_p, |
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1579 jmethodID** to_dealloc_jmeths_p) { |
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|
1580 assert(new_id != NULL, "sanity check"); |
|
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|
1581 assert(to_dealloc_id_p != NULL, "sanity check"); |
|
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|
1582 assert(to_dealloc_jmeths_p != NULL, "sanity check"); |
|
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|
1583 assert(Threads::number_of_threads() == 0 || |
|
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|
1584 SafepointSynchronize::is_at_safepoint() || |
|
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1585 JmethodIdCreation_lock->owned_by_self(), "sanity check"); |
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1586 |
|
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1587 // reacquire the cache - we are locked, single threaded or at a safepoint |
|
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1588 jmethodID* jmeths = ik_h->methods_jmethod_ids_acquire(); |
|
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1589 jmethodID id = NULL; |
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1590 size_t length = 0; |
| 0 | 1591 |
|
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1592 if (jmeths == NULL || // no cache yet |
|
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|
1593 (length = (size_t)jmeths[0]) <= idnum) { // cache is too short |
|
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1594 if (jmeths != NULL) { |
|
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1595 // copy any existing entries from the old cache |
|
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|
1596 for (size_t index = 0; index < length; index++) { |
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1597 new_jmeths[index+1] = jmeths[index+1]; |
| 0 | 1598 } |
|
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1599 *to_dealloc_jmeths_p = jmeths; // save old cache for later delete |
| 0 | 1600 } |
|
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1601 ik_h->release_set_methods_jmethod_ids(jmeths = new_jmeths); |
|
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1602 } else { |
|
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1603 // fetch jmethodID (if any) from the existing cache |
|
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1604 id = jmeths[idnum+1]; |
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1605 *to_dealloc_jmeths_p = new_jmeths; // save new cache for later delete |
|
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1606 } |
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1607 if (id == NULL) { |
|
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1608 // No matching jmethodID in the existing cache or we have a new |
|
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1609 // cache or we just grew the cache. This cache write is done here |
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1610 // by the first thread to win the foot race because a jmethodID |
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1611 // needs to be unique once it is generally available. |
|
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1612 id = new_id; |
|
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1613 |
|
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1614 // The jmethodID cache can be read while unlocked so we have to |
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1615 // make sure the new jmethodID is complete before installing it |
|
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1616 // in the cache. |
|
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1617 OrderAccess::release_store_ptr(&jmeths[idnum+1], id); |
|
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1618 } else { |
|
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1619 *to_dealloc_id_p = new_id; // save new id for later delete |
| 0 | 1620 } |
| 1621 return id; | |
| 1622 } | |
| 1623 | |
| 1624 | |
|
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1625 // Common code to get the jmethodID cache length and the jmethodID |
|
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1626 // value at index idnum if there is one. |
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1627 // |
|
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1628 void InstanceKlass::get_jmethod_id_length_value(jmethodID* cache, |
|
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1629 size_t idnum, size_t *length_p, jmethodID* id_p) { |
|
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1630 assert(cache != NULL, "sanity check"); |
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1631 assert(length_p != NULL, "sanity check"); |
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1632 assert(id_p != NULL, "sanity check"); |
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1633 |
|
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1634 // cache size is stored in element[0], other elements offset by one |
|
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1635 *length_p = (size_t)cache[0]; |
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1636 if (*length_p <= idnum) { // cache is too short |
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1637 *id_p = NULL; |
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1638 } else { |
|
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1639 *id_p = cache[idnum+1]; // fetch jmethodID (if any) |
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1640 } |
|
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1641 } |
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1642 |
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1643 |
| 0 | 1644 // Lookup a jmethodID, NULL if not found. Do no blocking, no allocations, no handles |
|
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1645 jmethodID InstanceKlass::jmethod_id_or_null(Method* method) { |
| 0 | 1646 size_t idnum = (size_t)method->method_idnum(); |
| 1647 jmethodID* jmeths = methods_jmethod_ids_acquire(); | |
| 1648 size_t length; // length assigned as debugging crumb | |
| 1649 jmethodID id = NULL; | |
|
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1650 if (jmeths != NULL && // If there is a cache |
| 0 | 1651 (length = (size_t)jmeths[0]) > idnum) { // and if it is long enough, |
| 1652 id = jmeths[idnum+1]; // Look up the id (may be NULL) | |
| 1653 } | |
| 1654 return id; | |
| 1655 } | |
| 1656 | |
| 1657 | |
| 1658 // Cache an itable index | |
|
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1659 void InstanceKlass::set_cached_itable_index(size_t idnum, int index) { |
| 0 | 1660 int* indices = methods_cached_itable_indices_acquire(); |
|
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1661 int* to_dealloc_indices = NULL; |
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1662 |
|
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1663 // We use a double-check locking idiom here because this cache is |
|
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1664 // performance sensitive. In the normal system, this cache only |
|
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1665 // transitions from NULL to non-NULL which is safe because we use |
|
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1666 // release_set_methods_cached_itable_indices() to advertise the |
|
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1667 // new cache. A partially constructed cache should never be seen |
|
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1668 // by a racing thread. Cache reads and writes proceed without a |
|
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1669 // lock, but creation of the cache itself requires no leaks so a |
|
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1670 // lock is generally acquired in that case. |
|
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|
1671 // |
|
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1672 // If the RedefineClasses() API has been used, then this cache can |
|
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1673 // grow and we'll have transitions from non-NULL to bigger non-NULL. |
|
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1674 // Cache creation requires no leaks and we require safety between all |
|
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1675 // cache accesses and freeing of the old cache so a lock is generally |
|
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|
1676 // acquired when the RedefineClasses() API has been used. |
|
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|
1677 |
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|
1678 if (indices == NULL || idnum_can_increment()) { |
|
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1679 // we need a cache or the cache can grow |
| 0 | 1680 MutexLocker ml(JNICachedItableIndex_lock); |
|
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1681 // reacquire the cache to see if another thread already did the work |
| 0 | 1682 indices = methods_cached_itable_indices_acquire(); |
| 1683 size_t length = 0; | |
|
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1684 // cache size is stored in element[0], other elements offset by one |
| 0 | 1685 if (indices == NULL || (length = (size_t)indices[0]) <= idnum) { |
| 1686 size_t size = MAX2(idnum+1, (size_t)idnum_allocated_count()); | |
| 6197 | 1687 int* new_indices = NEW_C_HEAP_ARRAY(int, size+1, mtClass); |
|
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1688 new_indices[0] = (int)size; |
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1689 // copy any existing entries |
| 0 | 1690 size_t i; |
| 1691 for (i = 0; i < length; i++) { | |
| 1692 new_indices[i+1] = indices[i+1]; | |
| 1693 } | |
| 1694 // Set all the rest to -1 | |
| 1695 for (i = length; i < size; i++) { | |
| 1696 new_indices[i+1] = -1; | |
| 1697 } | |
| 1698 if (indices != NULL) { | |
|
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1699 // We have an old cache to delete so save it for after we |
|
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|
1700 // drop the lock. |
|
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|
1701 to_dealloc_indices = indices; |
| 0 | 1702 } |
| 1703 release_set_methods_cached_itable_indices(indices = new_indices); | |
| 1704 } | |
|
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1705 |
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1706 if (idnum_can_increment()) { |
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1707 // this cache can grow so we have to write to it safely |
|
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1708 indices[idnum+1] = index; |
|
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1709 } |
| 0 | 1710 } else { |
| 1711 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops()); | |
| 1712 } | |
|
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|
1713 |
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1714 if (!idnum_can_increment()) { |
|
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1715 // The cache cannot grow and this JNI itable index value does not |
|
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1716 // have to be unique like a jmethodID. If there is a race to set it, |
|
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1717 // it doesn't matter. |
|
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|
1718 indices[idnum+1] = index; |
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|
1719 } |
|
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1720 |
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1721 if (to_dealloc_indices != NULL) { |
|
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1722 // we allocated a new cache so free the old one |
|
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|
1723 FreeHeap(to_dealloc_indices); |
|
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|
1724 } |
| 0 | 1725 } |
| 1726 | |
| 1727 | |
| 1728 // Retrieve a cached itable index | |
|
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1729 int InstanceKlass::cached_itable_index(size_t idnum) { |
| 0 | 1730 int* indices = methods_cached_itable_indices_acquire(); |
| 1731 if (indices != NULL && ((size_t)indices[0]) > idnum) { | |
| 1732 // indices exist and are long enough, retrieve possible cached | |
| 1733 return indices[idnum+1]; | |
| 1734 } | |
| 1735 return -1; | |
| 1736 } | |
| 1737 | |
| 1738 | |
| 1739 // | |
| 1740 // Walk the list of dependent nmethods searching for nmethods which | |
|
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1741 // are dependent on the changes that were passed in and mark them for |
| 0 | 1742 // deoptimization. Returns the number of nmethods found. |
| 1743 // | |
|
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1744 int InstanceKlass::mark_dependent_nmethods(DepChange& changes) { |
| 0 | 1745 assert_locked_or_safepoint(CodeCache_lock); |
| 1746 int found = 0; | |
| 1747 nmethodBucket* b = _dependencies; | |
| 1748 while (b != NULL) { | |
| 1749 nmethod* nm = b->get_nmethod(); | |
| 1750 // since dependencies aren't removed until an nmethod becomes a zombie, | |
| 1751 // the dependency list may contain nmethods which aren't alive. | |
| 1752 if (nm->is_alive() && !nm->is_marked_for_deoptimization() && nm->check_dependency_on(changes)) { | |
| 1753 if (TraceDependencies) { | |
| 1754 ResourceMark rm; | |
| 1755 tty->print_cr("Marked for deoptimization"); | |
| 1756 tty->print_cr(" context = %s", this->external_name()); | |
| 1757 changes.print(); | |
| 1758 nm->print(); | |
| 1759 nm->print_dependencies(); | |
| 1760 } | |
| 1761 nm->mark_for_deoptimization(); | |
| 1762 found++; | |
| 1763 } | |
| 1764 b = b->next(); | |
| 1765 } | |
| 1766 return found; | |
| 1767 } | |
| 1768 | |
| 1769 | |
| 1770 // | |
| 1771 // Add an nmethodBucket to the list of dependencies for this nmethod. | |
| 1772 // It's possible that an nmethod has multiple dependencies on this klass | |
| 1773 // so a count is kept for each bucket to guarantee that creation and | |
| 1774 // deletion of dependencies is consistent. | |
| 1775 // | |
|
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1776 void InstanceKlass::add_dependent_nmethod(nmethod* nm) { |
| 0 | 1777 assert_locked_or_safepoint(CodeCache_lock); |
| 1778 nmethodBucket* b = _dependencies; | |
| 1779 nmethodBucket* last = NULL; | |
| 1780 while (b != NULL) { | |
| 1781 if (nm == b->get_nmethod()) { | |
| 1782 b->increment(); | |
| 1783 return; | |
| 1784 } | |
| 1785 b = b->next(); | |
| 1786 } | |
| 1787 _dependencies = new nmethodBucket(nm, _dependencies); | |
| 1788 } | |
| 1789 | |
| 1790 | |
| 1791 // | |
| 1792 // Decrement count of the nmethod in the dependency list and remove | |
| 1793 // the bucket competely when the count goes to 0. This method must | |
| 1794 // find a corresponding bucket otherwise there's a bug in the | |
| 1795 // recording of dependecies. | |
| 1796 // | |
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1797 void InstanceKlass::remove_dependent_nmethod(nmethod* nm) { |
| 0 | 1798 assert_locked_or_safepoint(CodeCache_lock); |
| 1799 nmethodBucket* b = _dependencies; | |
| 1800 nmethodBucket* last = NULL; | |
| 1801 while (b != NULL) { | |
| 1802 if (nm == b->get_nmethod()) { | |
| 1803 if (b->decrement() == 0) { | |
| 1804 if (last == NULL) { | |
| 1805 _dependencies = b->next(); | |
| 1806 } else { | |
| 1807 last->set_next(b->next()); | |
| 1808 } | |
| 1809 delete b; | |
| 1810 } | |
| 1811 return; | |
| 1812 } | |
| 1813 last = b; | |
| 1814 b = b->next(); | |
| 1815 } | |
| 1816 #ifdef ASSERT | |
| 1817 tty->print_cr("### %s can't find dependent nmethod:", this->external_name()); | |
| 1818 nm->print(); | |
| 1819 #endif // ASSERT | |
| 1820 ShouldNotReachHere(); | |
| 1821 } | |
| 1822 | |
| 1823 | |
| 1824 #ifndef PRODUCT | |
|
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1825 void InstanceKlass::print_dependent_nmethods(bool verbose) { |
| 0 | 1826 nmethodBucket* b = _dependencies; |
| 1827 int idx = 0; | |
| 1828 while (b != NULL) { | |
| 1829 nmethod* nm = b->get_nmethod(); | |
| 1830 tty->print("[%d] count=%d { ", idx++, b->count()); | |
| 1831 if (!verbose) { | |
| 1832 nm->print_on(tty, "nmethod"); | |
| 1833 tty->print_cr(" } "); | |
| 1834 } else { | |
| 1835 nm->print(); | |
| 1836 nm->print_dependencies(); | |
| 1837 tty->print_cr("--- } "); | |
| 1838 } | |
| 1839 b = b->next(); | |
| 1840 } | |
| 1841 } | |
| 1842 | |
| 1843 | |
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1844 bool InstanceKlass::is_dependent_nmethod(nmethod* nm) { |
| 0 | 1845 nmethodBucket* b = _dependencies; |
| 1846 while (b != NULL) { | |
| 1847 if (nm == b->get_nmethod()) { | |
| 1848 return true; | |
| 1849 } | |
| 1850 b = b->next(); | |
| 1851 } | |
| 1852 return false; | |
| 1853 } | |
| 1854 #endif //PRODUCT | |
| 1855 | |
| 1856 | |
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1857 // Garbage collection |
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1858 |
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1859 void InstanceKlass::oops_do(OopClosure* cl) { |
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1860 Klass::oops_do(cl); |
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1861 |
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1862 cl->do_oop(adr_protection_domain()); |
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1863 cl->do_oop(adr_signers()); |
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1864 cl->do_oop(adr_init_lock()); |
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1865 |
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1866 // Don't walk the arrays since they are walked from the ClassLoaderData objects. |
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1867 } |
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1868 |
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1869 #ifdef ASSERT |
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1870 template <class T> void assert_is_in(T *p) { |
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1871 T heap_oop = oopDesc::load_heap_oop(p); |
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1872 if (!oopDesc::is_null(heap_oop)) { |
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1873 oop o = oopDesc::decode_heap_oop_not_null(heap_oop); |
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1874 assert(Universe::heap()->is_in(o), "should be in heap"); |
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1875 } |
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1876 } |
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1877 template <class T> void assert_is_in_closed_subset(T *p) { |
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1878 T heap_oop = oopDesc::load_heap_oop(p); |
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1879 if (!oopDesc::is_null(heap_oop)) { |
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1880 oop o = oopDesc::decode_heap_oop_not_null(heap_oop); |
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1881 assert(Universe::heap()->is_in_closed_subset(o), |
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1882 err_msg("should be in closed *p " INTPTR_FORMAT " " INTPTR_FORMAT, (address)p, (address)o)); |
|
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1883 } |
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1884 } |
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1885 template <class T> void assert_is_in_reserved(T *p) { |
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1886 T heap_oop = oopDesc::load_heap_oop(p); |
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1887 if (!oopDesc::is_null(heap_oop)) { |
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1888 oop o = oopDesc::decode_heap_oop_not_null(heap_oop); |
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1889 assert(Universe::heap()->is_in_reserved(o), "should be in reserved"); |
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1890 } |
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1891 } |
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1892 template <class T> void assert_nothing(T *p) {} |
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1893 |
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1894 #else |
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1895 template <class T> void assert_is_in(T *p) {} |
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1896 template <class T> void assert_is_in_closed_subset(T *p) {} |
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1897 template <class T> void assert_is_in_reserved(T *p) {} |
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1898 template <class T> void assert_nothing(T *p) {} |
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1899 #endif // ASSERT |
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1900 |
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1901 // |
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1902 // Macros that iterate over areas of oops which are specialized on type of |
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1903 // oop pointer either narrow or wide, depending on UseCompressedOops |
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1904 // |
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1905 // Parameters are: |
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1906 // T - type of oop to point to (either oop or narrowOop) |
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1907 // start_p - starting pointer for region to iterate over |
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1908 // count - number of oops or narrowOops to iterate over |
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1909 // do_oop - action to perform on each oop (it's arbitrary C code which |
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1910 // makes it more efficient to put in a macro rather than making |
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1911 // it a template function) |
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1912 // assert_fn - assert function which is template function because performance |
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1913 // doesn't matter when enabled. |
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1914 #define InstanceKlass_SPECIALIZED_OOP_ITERATE( \ |
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1915 T, start_p, count, do_oop, \ |
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1916 assert_fn) \ |
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1917 { \ |
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1918 T* p = (T*)(start_p); \ |
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1919 T* const end = p + (count); \ |
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1920 while (p < end) { \ |
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1921 (assert_fn)(p); \ |
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1922 do_oop; \ |
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1923 ++p; \ |
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1924 } \ |
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1925 } |
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1926 |
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1927 #define InstanceKlass_SPECIALIZED_OOP_REVERSE_ITERATE( \ |
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1928 T, start_p, count, do_oop, \ |
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1929 assert_fn) \ |
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1930 { \ |
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1931 T* const start = (T*)(start_p); \ |
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1932 T* p = start + (count); \ |
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1933 while (start < p) { \ |
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1934 --p; \ |
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1935 (assert_fn)(p); \ |
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1936 do_oop; \ |
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1937 } \ |
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1938 } |
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1939 |
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1940 #define InstanceKlass_SPECIALIZED_BOUNDED_OOP_ITERATE( \ |
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1941 T, start_p, count, low, high, \ |
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1942 do_oop, assert_fn) \ |
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1943 { \ |
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1944 T* const l = (T*)(low); \ |
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1945 T* const h = (T*)(high); \ |
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1946 assert(mask_bits((intptr_t)l, sizeof(T)-1) == 0 && \ |
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1947 mask_bits((intptr_t)h, sizeof(T)-1) == 0, \ |
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1948 "bounded region must be properly aligned"); \ |
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1949 T* p = (T*)(start_p); \ |
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1950 T* end = p + (count); \ |
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1951 if (p < l) p = l; \ |
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1952 if (end > h) end = h; \ |
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1953 while (p < end) { \ |
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1954 (assert_fn)(p); \ |
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1955 do_oop; \ |
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1956 ++p; \ |
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1957 } \ |
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1958 } |
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1959 |
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1960 |
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1961 // The following macros call specialized macros, passing either oop or |
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1962 // narrowOop as the specialization type. These test the UseCompressedOops |
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1963 // flag. |
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1964 #define InstanceKlass_OOP_MAP_ITERATE(obj, do_oop, assert_fn) \ |
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1965 { \ |
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1966 /* Compute oopmap block range. The common case \ |
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1967 is nonstatic_oop_map_size == 1. */ \ |
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1968 OopMapBlock* map = start_of_nonstatic_oop_maps(); \ |
| 938 | 1969 OopMapBlock* const end_map = map + nonstatic_oop_map_count(); \ |
|
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1970 if (UseCompressedOops) { \ |
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1971 while (map < end_map) { \ |
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1972 InstanceKlass_SPECIALIZED_OOP_ITERATE(narrowOop, \ |
| 938 | 1973 obj->obj_field_addr<narrowOop>(map->offset()), map->count(), \ |
|
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1974 do_oop, assert_fn) \ |
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1975 ++map; \ |
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1976 } \ |
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1977 } else { \ |
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1978 while (map < end_map) { \ |
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1979 InstanceKlass_SPECIALIZED_OOP_ITERATE(oop, \ |
| 938 | 1980 obj->obj_field_addr<oop>(map->offset()), map->count(), \ |
|
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1981 do_oop, assert_fn) \ |
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1982 ++map; \ |
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1983 } \ |
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1984 } \ |
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1985 } |
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1986 |
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1987 #define InstanceKlass_OOP_MAP_REVERSE_ITERATE(obj, do_oop, assert_fn) \ |
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1988 { \ |
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1989 OopMapBlock* const start_map = start_of_nonstatic_oop_maps(); \ |
| 938 | 1990 OopMapBlock* map = start_map + nonstatic_oop_map_count(); \ |
|
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1991 if (UseCompressedOops) { \ |
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1992 while (start_map < map) { \ |
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1993 --map; \ |
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1994 InstanceKlass_SPECIALIZED_OOP_REVERSE_ITERATE(narrowOop, \ |
| 938 | 1995 obj->obj_field_addr<narrowOop>(map->offset()), map->count(), \ |
|
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1996 do_oop, assert_fn) \ |
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1997 } \ |
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1998 } else { \ |
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1999 while (start_map < map) { \ |
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2000 --map; \ |
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2001 InstanceKlass_SPECIALIZED_OOP_REVERSE_ITERATE(oop, \ |
| 938 | 2002 obj->obj_field_addr<oop>(map->offset()), map->count(), \ |
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2003 do_oop, assert_fn) \ |
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2004 } \ |
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2005 } \ |
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2006 } |
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2007 |
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2008 #define InstanceKlass_BOUNDED_OOP_MAP_ITERATE(obj, low, high, do_oop, \ |
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2009 assert_fn) \ |
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2010 { \ |
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2011 /* Compute oopmap block range. The common case is \ |
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2012 nonstatic_oop_map_size == 1, so we accept the \ |
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2013 usually non-existent extra overhead of examining \ |
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2014 all the maps. */ \ |
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2015 OopMapBlock* map = start_of_nonstatic_oop_maps(); \ |
| 938 | 2016 OopMapBlock* const end_map = map + nonstatic_oop_map_count(); \ |
|
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2017 if (UseCompressedOops) { \ |
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2018 while (map < end_map) { \ |
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2019 InstanceKlass_SPECIALIZED_BOUNDED_OOP_ITERATE(narrowOop, \ |
| 938 | 2020 obj->obj_field_addr<narrowOop>(map->offset()), map->count(), \ |
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2021 low, high, \ |
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2022 do_oop, assert_fn) \ |
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2023 ++map; \ |
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2024 } \ |
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2025 } else { \ |
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2026 while (map < end_map) { \ |
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2027 InstanceKlass_SPECIALIZED_BOUNDED_OOP_ITERATE(oop, \ |
| 938 | 2028 obj->obj_field_addr<oop>(map->offset()), map->count(), \ |
|
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2029 low, high, \ |
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2030 do_oop, assert_fn) \ |
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2031 ++map; \ |
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2032 } \ |
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2033 } \ |
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2034 } |
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2035 |
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2036 void InstanceKlass::oop_follow_contents(oop obj) { |
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2037 assert(obj != NULL, "can't follow the content of NULL object"); |
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2038 MarkSweep::follow_klass(obj->klass()); |
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2039 InstanceKlass_OOP_MAP_ITERATE( \ |
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2040 obj, \ |
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2041 MarkSweep::mark_and_push(p), \ |
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2042 assert_is_in_closed_subset) |
| 0 | 2043 } |
| 2044 | |
| 2045 #ifndef SERIALGC | |
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2046 void InstanceKlass::oop_follow_contents(ParCompactionManager* cm, |
| 0 | 2047 oop obj) { |
|
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2048 assert(obj != NULL, "can't follow the content of NULL object"); |
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2049 PSParallelCompact::follow_klass(cm, obj->klass()); |
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2050 // Only mark the header and let the scan of the meta-data mark |
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2051 // everything else. |
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2052 InstanceKlass_OOP_MAP_ITERATE( \ |
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2053 obj, \ |
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2054 PSParallelCompact::mark_and_push(cm, p), \ |
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2055 assert_is_in) |
| 0 | 2056 } |
| 2057 #endif // SERIALGC | |
| 2058 | |
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2059 // closure's do_metadata() method dictates whether the given closure should be |
| 0 | 2060 // applied to the klass ptr in the object header. |
| 2061 | |
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2062 #define if_do_metadata_checked(closure, nv_suffix) \ |
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2063 /* Make sure the non-virtual and the virtual versions match. */ \ |
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2064 assert(closure->do_metadata##nv_suffix() == closure->do_metadata(), \ |
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2065 "Inconsistency in do_metadata"); \ |
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2066 if (closure->do_metadata##nv_suffix()) |
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2067 |
|
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2068 #define InstanceKlass_OOP_OOP_ITERATE_DEFN(OopClosureType, nv_suffix) \ |
|
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2069 \ |
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2070 int InstanceKlass::oop_oop_iterate##nv_suffix(oop obj, OopClosureType* closure) { \ |
|
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2071 SpecializationStats::record_iterate_call##nv_suffix(SpecializationStats::ik);\ |
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2072 /* header */ \ |
|
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2073 if_do_metadata_checked(closure, nv_suffix) { \ |
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2074 closure->do_klass##nv_suffix(obj->klass()); \ |
|
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2075 } \ |
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2076 InstanceKlass_OOP_MAP_ITERATE( \ |
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2077 obj, \ |
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2078 SpecializationStats:: \ |
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2079 record_do_oop_call##nv_suffix(SpecializationStats::ik); \ |
|
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2080 (closure)->do_oop##nv_suffix(p), \ |
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2081 assert_is_in_closed_subset) \ |
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2082 return size_helper(); \ |
| 0 | 2083 } |
| 2084 | |
|
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2085 #ifndef SERIALGC |
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2086 #define InstanceKlass_OOP_OOP_ITERATE_BACKWARDS_DEFN(OopClosureType, nv_suffix) \ |
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2087 \ |
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2088 int InstanceKlass::oop_oop_iterate_backwards##nv_suffix(oop obj, \ |
|
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2089 OopClosureType* closure) { \ |
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2090 SpecializationStats::record_iterate_call##nv_suffix(SpecializationStats::ik); \ |
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2091 /* header */ \ |
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2092 if_do_metadata_checked(closure, nv_suffix) { \ |
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2093 closure->do_klass##nv_suffix(obj->klass()); \ |
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2094 } \ |
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2095 /* instance variables */ \ |
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2096 InstanceKlass_OOP_MAP_REVERSE_ITERATE( \ |
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2097 obj, \ |
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2098 SpecializationStats::record_do_oop_call##nv_suffix(SpecializationStats::ik);\ |
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2099 (closure)->do_oop##nv_suffix(p), \ |
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2100 assert_is_in_closed_subset) \ |
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2101 return size_helper(); \ |
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2102 } |
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2103 #endif // !SERIALGC |
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2104 |
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2105 #define InstanceKlass_OOP_OOP_ITERATE_DEFN_m(OopClosureType, nv_suffix) \ |
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2106 \ |
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2107 int InstanceKlass::oop_oop_iterate##nv_suffix##_m(oop obj, \ |
|
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2108 OopClosureType* closure, \ |
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2109 MemRegion mr) { \ |
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2110 SpecializationStats::record_iterate_call##nv_suffix(SpecializationStats::ik);\ |
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2111 if_do_metadata_checked(closure, nv_suffix) { \ |
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2112 if (mr.contains(obj)) { \ |
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2113 closure->do_klass##nv_suffix(obj->klass()); \ |
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2114 } \ |
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2115 } \ |
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2116 InstanceKlass_BOUNDED_OOP_MAP_ITERATE( \ |
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2117 obj, mr.start(), mr.end(), \ |
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2118 (closure)->do_oop##nv_suffix(p), \ |
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2119 assert_is_in_closed_subset) \ |
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2120 return size_helper(); \ |
| 0 | 2121 } |
| 2122 | |
| 2123 ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceKlass_OOP_OOP_ITERATE_DEFN) | |
|
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2124 ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceKlass_OOP_OOP_ITERATE_DEFN) |
| 0 | 2125 ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceKlass_OOP_OOP_ITERATE_DEFN_m) |
|
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2126 ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceKlass_OOP_OOP_ITERATE_DEFN_m) |
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2127 #ifndef SERIALGC |
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2128 ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceKlass_OOP_OOP_ITERATE_BACKWARDS_DEFN) |
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2129 ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceKlass_OOP_OOP_ITERATE_BACKWARDS_DEFN) |
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2130 #endif // !SERIALGC |
| 0 | 2131 |
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2132 int InstanceKlass::oop_adjust_pointers(oop obj) { |
| 0 | 2133 int size = size_helper(); |
|
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2134 InstanceKlass_OOP_MAP_ITERATE( \ |
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2135 obj, \ |
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2136 MarkSweep::adjust_pointer(p), \ |
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2137 assert_is_in) |
|
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2138 MarkSweep::adjust_klass(obj->klass()); |
| 0 | 2139 return size; |
| 2140 } | |
| 2141 | |
| 2142 #ifndef SERIALGC | |
|
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2143 void InstanceKlass::oop_push_contents(PSPromotionManager* pm, oop obj) { |
|
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2144 InstanceKlass_OOP_MAP_REVERSE_ITERATE( \ |
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2145 obj, \ |
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2146 if (PSScavenge::should_scavenge(p)) { \ |
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2147 pm->claim_or_forward_depth(p); \ |
|
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2148 }, \ |
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2149 assert_nothing ) |
| 0 | 2150 } |
| 2151 | |
|
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2152 int InstanceKlass::oop_update_pointers(ParCompactionManager* cm, oop obj) { |
|
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2153 int size = size_helper(); |
|
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2154 InstanceKlass_OOP_MAP_ITERATE( \ |
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2155 obj, \ |
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2156 PSParallelCompact::adjust_pointer(p), \ |
|
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2157 assert_is_in) |
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2158 obj->update_header(cm); |
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2159 return size; |
| 0 | 2160 } |
| 2161 | |
| 2162 #endif // SERIALGC | |
| 2163 | |
|
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2164 void InstanceKlass::clean_implementors_list(BoolObjectClosure* is_alive) { |
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2165 assert(is_loader_alive(is_alive), "this klass should be live"); |
|
5998
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|
2166 if (is_interface()) { |
|
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|
2167 if (ClassUnloading) { |
|
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2168 Klass* impl = implementor(); |
|
5998
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|
2169 if (impl != NULL) { |
|
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2170 if (!impl->is_loader_alive(is_alive)) { |
|
5998
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|
2171 // remove this guy |
|
6038
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|
2172 *adr_implementor() = NULL; |
|
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2173 } |
| 0 | 2174 } |
|
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2175 } |
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2176 } |
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2177 } |
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2178 |
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2179 void InstanceKlass::clean_method_data(BoolObjectClosure* is_alive) { |
|
6950
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|
2180 #if defined(COMPILER2) || defined(GRAAL) |
|
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|
2181 // Currently only used by C2 and Graal |
|
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2182 for (int m = 0; m < methods()->length(); m++) { |
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2183 MethodData* mdo = methods()->at(m)->method_data(); |
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2184 if (mdo != NULL) { |
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2185 for (ProfileData* data = mdo->first_data(); |
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2186 mdo->is_valid(data); |
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2187 data = mdo->next_data(data)) { |
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2188 data->clean_weak_klass_links(is_alive); |
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2189 } |
| 0 | 2190 } |
| 2191 } | |
|
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2192 #else |
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2193 #ifdef ASSERT |
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2194 // Verify that we haven't started to use MDOs for C1. |
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2195 for (int m = 0; m < methods()->length(); m++) { |
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2196 MethodData* mdo = methods()->at(m)->method_data(); |
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2197 assert(mdo == NULL, "Didn't expect C1 to use MDOs"); |
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2198 } |
|
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2199 #endif // ASSERT |
|
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2200 #endif // !COMPILER2 |
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2201 } |
|
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2202 |
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2203 |
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2204 static void remove_unshareable_in_class(Klass* k) { |
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2205 // remove klass's unshareable info |
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2206 k->remove_unshareable_info(); |
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2207 } |
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2208 |
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2209 void InstanceKlass::remove_unshareable_info() { |
|
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2210 Klass::remove_unshareable_info(); |
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2211 // Unlink the class |
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2212 if (is_linked()) { |
|
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2213 unlink_class(); |
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2214 } |
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2215 init_implementor(); |
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2216 |
|
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2217 constants()->remove_unshareable_info(); |
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2218 |
|
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2219 for (int i = 0; i < methods()->length(); i++) { |
|
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2220 Method* m = methods()->at(i); |
|
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2221 m->remove_unshareable_info(); |
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2222 } |
|
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2223 |
|
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2224 // Need to reinstate when reading back the class. |
|
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2225 set_init_lock(NULL); |
|
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2226 |
|
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2227 // do array classes also. |
|
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2228 array_klasses_do(remove_unshareable_in_class); |
| 0 | 2229 } |
| 2230 | |
|
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2231 void restore_unshareable_in_class(Klass* k, TRAPS) { |
|
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2232 k->restore_unshareable_info(CHECK); |
| 0 | 2233 } |
| 2234 | |
|
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2235 void InstanceKlass::restore_unshareable_info(TRAPS) { |
|
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2236 Klass::restore_unshareable_info(CHECK); |
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2237 instanceKlassHandle ik(THREAD, this); |
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2238 |
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2239 Array<Method*>* methods = ik->methods(); |
|
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2240 int num_methods = methods->length(); |
|
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2241 for (int index2 = 0; index2 < num_methods; ++index2) { |
|
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2242 methodHandle m(THREAD, methods->at(index2)); |
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2243 m()->link_method(m, CHECK); |
|
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2244 // restore method's vtable by calling a virtual function |
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2245 m->restore_vtable(); |
|
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2246 } |
|
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2247 if (JvmtiExport::has_redefined_a_class()) { |
|
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2248 // Reinitialize vtable because RedefineClasses may have changed some |
|
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2249 // entries in this vtable for super classes so the CDS vtable might |
|
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2250 // point to old or obsolete entries. RedefineClasses doesn't fix up |
|
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2251 // vtables in the shared system dictionary, only the main one. |
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2252 // It also redefines the itable too so fix that too. |
|
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2253 ResourceMark rm(THREAD); |
|
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2254 ik->vtable()->initialize_vtable(false, CHECK); |
|
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2255 ik->itable()->initialize_itable(false, CHECK); |
|
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2256 } |
|
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2257 |
|
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2258 // Allocate a simple java object for a lock. |
|
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2259 // This needs to be a java object because during class initialization |
|
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2260 // it can be held across a java call. |
|
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2261 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK); |
|
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2262 Handle h(THREAD, (oop)r); |
|
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2263 ik->set_init_lock(h()); |
|
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2264 |
|
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|
2265 // restore constant pool resolved references |
|
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|
2266 ik->constants()->restore_unshareable_info(CHECK); |
|
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2267 |
|
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2268 ik->array_klasses_do(restore_unshareable_in_class, CHECK); |
|
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|
2269 } |
|
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|
2270 |
|
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2271 static void clear_all_breakpoints(Method* m) { |
| 0 | 2272 m->clear_all_breakpoints(); |
| 2273 } | |
| 2274 | |
|
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2275 void InstanceKlass::release_C_heap_structures() { |
| 0 | 2276 // Deallocate oop map cache |
| 2277 if (_oop_map_cache != NULL) { | |
| 2278 delete _oop_map_cache; | |
| 2279 _oop_map_cache = NULL; | |
| 2280 } | |
| 2281 | |
| 2282 // Deallocate JNI identifiers for jfieldIDs | |
| 2283 JNIid::deallocate(jni_ids()); | |
| 2284 set_jni_ids(NULL); | |
| 2285 | |
| 2286 jmethodID* jmeths = methods_jmethod_ids_acquire(); | |
| 2287 if (jmeths != (jmethodID*)NULL) { | |
| 2288 release_set_methods_jmethod_ids(NULL); | |
| 2289 FreeHeap(jmeths); | |
| 2290 } | |
| 2291 | |
| 2292 int* indices = methods_cached_itable_indices_acquire(); | |
| 2293 if (indices != (int*)NULL) { | |
| 2294 release_set_methods_cached_itable_indices(NULL); | |
| 2295 FreeHeap(indices); | |
| 2296 } | |
| 2297 | |
| 2298 // release dependencies | |
| 2299 nmethodBucket* b = _dependencies; | |
| 2300 _dependencies = NULL; | |
| 2301 while (b != NULL) { | |
| 2302 nmethodBucket* next = b->next(); | |
| 2303 delete b; | |
| 2304 b = next; | |
| 2305 } | |
| 2306 | |
| 2307 // Deallocate breakpoint records | |
| 2308 if (breakpoints() != 0x0) { | |
| 2309 methods_do(clear_all_breakpoints); | |
| 2310 assert(breakpoints() == 0x0, "should have cleared breakpoints"); | |
| 2311 } | |
| 2312 | |
| 2313 // deallocate information about previous versions | |
| 2314 if (_previous_versions != NULL) { | |
| 2315 for (int i = _previous_versions->length() - 1; i >= 0; i--) { | |
| 2316 PreviousVersionNode * pv_node = _previous_versions->at(i); | |
| 2317 delete pv_node; | |
| 2318 } | |
| 2319 delete _previous_versions; | |
| 2320 _previous_versions = NULL; | |
| 2321 } | |
| 2322 | |
| 2323 // deallocate the cached class file | |
| 2324 if (_cached_class_file_bytes != NULL) { | |
| 6197 | 2325 os::free(_cached_class_file_bytes, mtClass); |
| 0 | 2326 _cached_class_file_bytes = NULL; |
| 2327 _cached_class_file_len = 0; | |
| 2328 } | |
|
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
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|
2329 |
|
3582bf76420e
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|
2330 // Decrement symbol reference counts associated with the unloaded class. |
|
3582bf76420e
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|
2331 if (_name != NULL) _name->decrement_refcount(); |
|
3582bf76420e
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|
2332 // unreference array name derived from this class name (arrays of an unloaded |
|
3582bf76420e
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|
2333 // class can't be referenced anymore). |
|
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|
2334 if (_array_name != NULL) _array_name->decrement_refcount(); |
|
3582bf76420e
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|
2335 if (_source_file_name != NULL) _source_file_name->decrement_refcount(); |
|
6203
04ade88d9712
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|
2336 if (_source_debug_extension != NULL) FREE_C_HEAP_ARRAY(char, _source_debug_extension, mtClass); |
|
7464
ecd24264898b
8005048: NMT: #loaded classes needs to just show the # defined classes
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diff
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|
2337 |
|
ecd24264898b
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diff
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|
2338 assert(_total_instanceKlass_count >= 1, "Sanity check"); |
|
ecd24264898b
8005048: NMT: #loaded classes needs to just show the # defined classes
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|
2339 Atomic::dec(&_total_instanceKlass_count); |
|
2177
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|
2340 } |
|
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|
2341 |
|
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|
2342 void InstanceKlass::set_source_file_name(Symbol* n) { |
|
2177
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|
2343 _source_file_name = n; |
|
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|
2344 if (_source_file_name != NULL) _source_file_name->increment_refcount(); |
|
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|
2345 } |
|
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|
2346 |
|
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|
2347 void InstanceKlass::set_source_debug_extension(char* array, int length) { |
|
6203
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|
2348 if (array == NULL) { |
|
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|
2349 _source_debug_extension = NULL; |
|
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|
2350 } else { |
|
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|
2351 // Adding one to the attribute length in order to store a null terminator |
|
04ade88d9712
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|
2352 // character could cause an overflow because the attribute length is |
|
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|
2353 // already coded with an u4 in the classfile, but in practice, it's |
|
04ade88d9712
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|
2354 // unlikely to happen. |
|
04ade88d9712
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|
2355 assert((length+1) > length, "Overflow checking"); |
|
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|
2356 char* sde = NEW_C_HEAP_ARRAY(char, (length + 1), mtClass); |
|
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|
2357 for (int i = 0; i < length; i++) { |
|
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|
2358 sde[i] = array[i]; |
|
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|
2359 } |
|
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|
2360 sde[length] = '\0'; |
|
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|
2361 _source_debug_extension = sde; |
|
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|
2362 } |
| 0 | 2363 } |
| 2364 | |
|
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|
2365 address InstanceKlass::static_field_addr(int offset) { |
|
6735
aed758eda82a
7195833: NPG: Rename instanceClassLoaderKlass, instanceRefKlass and instanceMirrorKlass
coleenp
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6733
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|
2366 return (address)(offset + InstanceMirrorKlass::offset_of_static_fields() + (intptr_t)java_mirror()); |
|
2376
c7f3d0b4570f
7017732: move static fields into Class to prepare for perm gen removal
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diff
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|
2367 } |
|
c7f3d0b4570f
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|
2368 |
|
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|
2369 |
|
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|
2370 const char* InstanceKlass::signature_name() const { |
| 0 | 2371 const char* src = (const char*) (name()->as_C_string()); |
| 2372 const int src_length = (int)strlen(src); | |
| 2373 char* dest = NEW_RESOURCE_ARRAY(char, src_length + 3); | |
| 2374 int src_index = 0; | |
| 2375 int dest_index = 0; | |
| 2376 dest[dest_index++] = 'L'; | |
| 2377 while (src_index < src_length) { | |
| 2378 dest[dest_index++] = src[src_index++]; | |
| 2379 } | |
| 2380 dest[dest_index++] = ';'; | |
| 2381 dest[dest_index] = '\0'; | |
| 2382 return dest; | |
| 2383 } | |
| 2384 | |
| 2385 // different verisons of is_same_class_package | |
|
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|
2386 bool InstanceKlass::is_same_class_package(Klass* class2) { |
|
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|
2387 Klass* class1 = this; |
|
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|
2388 oop classloader1 = InstanceKlass::cast(class1)->class_loader(); |
| 6983 | 2389 Symbol* classname1 = class1->name(); |
| 2390 | |
| 2391 if (class2->oop_is_objArray()) { | |
|
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|
2392 class2 = ObjArrayKlass::cast(class2)->bottom_klass(); |
| 0 | 2393 } |
| 2394 oop classloader2; | |
| 6983 | 2395 if (class2->oop_is_instance()) { |
|
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|
2396 classloader2 = InstanceKlass::cast(class2)->class_loader(); |
| 0 | 2397 } else { |
| 6983 | 2398 assert(class2->oop_is_typeArray(), "should be type array"); |
| 0 | 2399 classloader2 = NULL; |
| 2400 } | |
| 6983 | 2401 Symbol* classname2 = class2->name(); |
| 0 | 2402 |
|
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|
2403 return InstanceKlass::is_same_class_package(classloader1, classname1, |
| 0 | 2404 classloader2, classname2); |
| 2405 } | |
| 2406 | |
|
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|
2407 bool InstanceKlass::is_same_class_package(oop classloader2, Symbol* classname2) { |
|
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|
2408 Klass* class1 = this; |
|
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|
2409 oop classloader1 = InstanceKlass::cast(class1)->class_loader(); |
| 6983 | 2410 Symbol* classname1 = class1->name(); |
| 0 | 2411 |
|
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|
2412 return InstanceKlass::is_same_class_package(classloader1, classname1, |
| 0 | 2413 classloader2, classname2); |
| 2414 } | |
| 2415 | |
| 2416 // return true if two classes are in the same package, classloader | |
| 2417 // and classname information is enough to determine a class's package | |
|
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|
2418 bool InstanceKlass::is_same_class_package(oop class_loader1, Symbol* class_name1, |
|
2177
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6990754: Use native memory and reference counting to implement SymbolTable
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|
2419 oop class_loader2, Symbol* class_name2) { |
| 0 | 2420 if (class_loader1 != class_loader2) { |
| 2421 return false; | |
|
665
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|
2422 } else if (class_name1 == class_name2) { |
|
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|
2423 return true; // skip painful bytewise comparison |
| 0 | 2424 } else { |
| 2425 ResourceMark rm; | |
| 2426 | |
|
2177
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diff
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|
2427 // The Symbol*'s are in UTF8 encoding. Since we only need to check explicitly |
| 0 | 2428 // for ASCII characters ('/', 'L', '['), we can keep them in UTF8 encoding. |
| 2429 // Otherwise, we just compare jbyte values between the strings. | |
|
2177
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diff
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|
2430 const jbyte *name1 = class_name1->base(); |
|
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
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diff
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|
2431 const jbyte *name2 = class_name2->base(); |
|
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diff
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|
2432 |
|
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
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|
2433 const jbyte *last_slash1 = UTF8::strrchr(name1, class_name1->utf8_length(), '/'); |
|
3582bf76420e
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diff
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|
2434 const jbyte *last_slash2 = UTF8::strrchr(name2, class_name2->utf8_length(), '/'); |
| 0 | 2435 |
| 2436 if ((last_slash1 == NULL) || (last_slash2 == NULL)) { | |
| 2437 // One of the two doesn't have a package. Only return true | |
| 2438 // if the other one also doesn't have a package. | |
| 2439 return last_slash1 == last_slash2; | |
| 2440 } else { | |
| 2441 // Skip over '['s | |
| 2442 if (*name1 == '[') { | |
| 2443 do { | |
| 2444 name1++; | |
| 2445 } while (*name1 == '['); | |
| 2446 if (*name1 != 'L') { | |
| 2447 // Something is terribly wrong. Shouldn't be here. | |
| 2448 return false; | |
| 2449 } | |
| 2450 } | |
| 2451 if (*name2 == '[') { | |
| 2452 do { | |
| 2453 name2++; | |
| 2454 } while (*name2 == '['); | |
| 2455 if (*name2 != 'L') { | |
| 2456 // Something is terribly wrong. Shouldn't be here. | |
| 2457 return false; | |
| 2458 } | |
| 2459 } | |
| 2460 | |
| 2461 // Check that package part is identical | |
| 2462 int length1 = last_slash1 - name1; | |
| 2463 int length2 = last_slash2 - name2; | |
| 2464 | |
| 2465 return UTF8::equal(name1, length1, name2, length2); | |
| 2466 } | |
| 2467 } | |
| 2468 } | |
| 2469 | |
|
652
4aaa9f5e02a8
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acorn
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diff
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|
2470 // Returns true iff super_method can be overridden by a method in targetclassname |
|
4aaa9f5e02a8
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diff
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|
2471 // See JSL 3rd edition 8.4.6.1 |
|
4aaa9f5e02a8
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diff
changeset
|
2472 // Assumes name-signature match |
|
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|
2473 // "this" is InstanceKlass of super_method which must exist |
|
da91efe96a93
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|
2474 // note that the InstanceKlass of the method in the targetclassname has not always been created yet |
|
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|
2475 bool InstanceKlass::is_override(methodHandle super_method, Handle targetclassloader, Symbol* targetclassname, TRAPS) { |
|
652
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605
diff
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|
2476 // Private methods can not be overridden |
|
4aaa9f5e02a8
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diff
changeset
|
2477 if (super_method->is_private()) { |
|
4aaa9f5e02a8
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parents:
605
diff
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|
2478 return false; |
|
4aaa9f5e02a8
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605
diff
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|
2479 } |
|
4aaa9f5e02a8
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605
diff
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|
2480 // If super method is accessible, then override |
|
4aaa9f5e02a8
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parents:
605
diff
changeset
|
2481 if ((super_method->is_protected()) || |
|
4aaa9f5e02a8
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acorn
parents:
605
diff
changeset
|
2482 (super_method->is_public())) { |
|
4aaa9f5e02a8
4766230: Hotspot vtable inconsistencies cause core dumps. 6579515. 6582242.
acorn
parents:
605
diff
changeset
|
2483 return true; |
|
4aaa9f5e02a8
4766230: Hotspot vtable inconsistencies cause core dumps. 6579515. 6582242.
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parents:
605
diff
changeset
|
2484 } |
|
4aaa9f5e02a8
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acorn
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605
diff
changeset
|
2485 // Package-private methods are not inherited outside of package |
|
4aaa9f5e02a8
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acorn
parents:
605
diff
changeset
|
2486 assert(super_method->is_package_private(), "must be package private"); |
|
2177
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6990754: Use native memory and reference counting to implement SymbolTable
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diff
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|
2487 return(is_same_class_package(targetclassloader(), targetclassname)); |
|
652
4aaa9f5e02a8
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acorn
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605
diff
changeset
|
2488 } |
| 0 | 2489 |
|
665
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6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2490 /* defined for now in jvm.cpp, for historical reasons *-- |
|
6725
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6964458: Reimplement class meta-data storage to use native memory
coleenp
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6266
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changeset
|
2491 Klass* InstanceKlass::compute_enclosing_class_impl(instanceKlassHandle self, |
|
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
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1972
diff
changeset
|
2492 Symbol*& simple_name_result, TRAPS) { |
|
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2493 ... |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
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605
diff
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|
2494 } |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
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605
diff
changeset
|
2495 */ |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
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605
diff
changeset
|
2496 |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
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605
diff
changeset
|
2497 // tell if two classes have the same enclosing class (at package level) |
|
6725
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6266
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|
2498 bool InstanceKlass::is_same_package_member_impl(instanceKlassHandle class1, |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6266
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|
2499 Klass* class2_oop, TRAPS) { |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6266
diff
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|
2500 if (class2_oop == class1()) return true; |
| 6983 | 2501 if (!class2_oop->oop_is_instance()) return false; |
|
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
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605
diff
changeset
|
2502 instanceKlassHandle class2(THREAD, class2_oop); |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
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605
diff
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|
2503 |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
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605
diff
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|
2504 // must be in same package before we try anything else |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
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605
diff
changeset
|
2505 if (!class1->is_same_class_package(class2->class_loader(), class2->name())) |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2506 return false; |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
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605
diff
changeset
|
2507 |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
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605
diff
changeset
|
2508 // As long as there is an outer1.getEnclosingClass, |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
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605
diff
changeset
|
2509 // shift the search outward. |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
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605
diff
changeset
|
2510 instanceKlassHandle outer1 = class1; |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
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605
diff
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|
2511 for (;;) { |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
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605
diff
changeset
|
2512 // As we walk along, look for equalities between outer1 and class2. |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2513 // Eventually, the walks will terminate as outer1 stops |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
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605
diff
changeset
|
2514 // at the top-level class around the original class. |
|
1126
933a3e806ce6
6895168: JCK api/signaturetest/sigtest.basic.html#basic test fails for jdk 5.0 with HS 16 in nightly build
xlu
parents:
1039
diff
changeset
|
2515 bool ignore_inner_is_member; |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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6266
diff
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|
2516 Klass* next = outer1->compute_enclosing_class(&ignore_inner_is_member, |
|
1126
933a3e806ce6
6895168: JCK api/signaturetest/sigtest.basic.html#basic test fails for jdk 5.0 with HS 16 in nightly build
xlu
parents:
1039
diff
changeset
|
2517 CHECK_false); |
|
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2518 if (next == NULL) break; |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2519 if (next == class2()) return true; |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2520 outer1 = instanceKlassHandle(THREAD, next); |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
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605
diff
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|
2521 } |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
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605
diff
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|
2522 |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
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605
diff
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|
2523 // Now do the same for class2. |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2524 instanceKlassHandle outer2 = class2; |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
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605
diff
changeset
|
2525 for (;;) { |
|
1126
933a3e806ce6
6895168: JCK api/signaturetest/sigtest.basic.html#basic test fails for jdk 5.0 with HS 16 in nightly build
xlu
parents:
1039
diff
changeset
|
2526 bool ignore_inner_is_member; |
|
6725
da91efe96a93
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|
2527 Klass* next = outer2->compute_enclosing_class(&ignore_inner_is_member, |
|
1126
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6895168: JCK api/signaturetest/sigtest.basic.html#basic test fails for jdk 5.0 with HS 16 in nightly build
xlu
parents:
1039
diff
changeset
|
2528 CHECK_false); |
|
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2529 if (next == NULL) break; |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2530 // Might as well check the new outer against all available values. |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2531 if (next == class1()) return true; |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
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605
diff
changeset
|
2532 if (next == outer1()) return true; |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2533 outer2 = instanceKlassHandle(THREAD, next); |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
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605
diff
changeset
|
2534 } |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
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605
diff
changeset
|
2535 |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
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605
diff
changeset
|
2536 // If by this point we have not found an equality between the |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
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605
diff
changeset
|
2537 // two classes, we know they are in separate package members. |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2538 return false; |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2539 } |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2540 |
| 0 | 2541 |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6266
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changeset
|
2542 jint InstanceKlass::compute_modifier_flags(TRAPS) const { |
| 0 | 2543 jint access = access_flags().as_int(); |
| 2544 | |
| 2545 // But check if it happens to be member class. | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6266
diff
changeset
|
2546 instanceKlassHandle ik(THREAD, this); |
|
5967
f7c4174b33ba
7109878: The instanceKlass EnclosingMethhod attribute fields can be folded into the _inner_class field.
jiangli
parents:
4739
diff
changeset
|
2547 InnerClassesIterator iter(ik); |
|
f7c4174b33ba
7109878: The instanceKlass EnclosingMethhod attribute fields can be folded into the _inner_class field.
jiangli
parents:
4739
diff
changeset
|
2548 for (; !iter.done(); iter.next()) { |
|
f7c4174b33ba
7109878: The instanceKlass EnclosingMethhod attribute fields can be folded into the _inner_class field.
jiangli
parents:
4739
diff
changeset
|
2549 int ioff = iter.inner_class_info_index(); |
|
f7c4174b33ba
7109878: The instanceKlass EnclosingMethhod attribute fields can be folded into the _inner_class field.
jiangli
parents:
4739
diff
changeset
|
2550 // Inner class attribute can be zero, skip it. |
|
f7c4174b33ba
7109878: The instanceKlass EnclosingMethhod attribute fields can be folded into the _inner_class field.
jiangli
parents:
4739
diff
changeset
|
2551 // Strange but true: JVM spec. allows null inner class refs. |
|
f7c4174b33ba
7109878: The instanceKlass EnclosingMethhod attribute fields can be folded into the _inner_class field.
jiangli
parents:
4739
diff
changeset
|
2552 if (ioff == 0) continue; |
|
f7c4174b33ba
7109878: The instanceKlass EnclosingMethhod attribute fields can be folded into the _inner_class field.
jiangli
parents:
4739
diff
changeset
|
2553 |
|
f7c4174b33ba
7109878: The instanceKlass EnclosingMethhod attribute fields can be folded into the _inner_class field.
jiangli
parents:
4739
diff
changeset
|
2554 // only look at classes that are already loaded |
|
f7c4174b33ba
7109878: The instanceKlass EnclosingMethhod attribute fields can be folded into the _inner_class field.
jiangli
parents:
4739
diff
changeset
|
2555 // since we are looking for the flags for our self. |
|
f7c4174b33ba
7109878: The instanceKlass EnclosingMethhod attribute fields can be folded into the _inner_class field.
jiangli
parents:
4739
diff
changeset
|
2556 Symbol* inner_name = ik->constants()->klass_name_at(ioff); |
|
f7c4174b33ba
7109878: The instanceKlass EnclosingMethhod attribute fields can be folded into the _inner_class field.
jiangli
parents:
4739
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2557 if ((ik->name() == inner_name)) { |
|
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2558 // This is really a member class. |
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2559 access = iter.inner_access_flags(); |
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2560 break; |
| 0 | 2561 } |
| 2562 } | |
| 2563 // Remember to strip ACC_SUPER bit | |
| 2564 return (access & (~JVM_ACC_SUPER)) & JVM_ACC_WRITTEN_FLAGS; | |
| 2565 } | |
| 2566 | |
|
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2567 jint InstanceKlass::jvmti_class_status() const { |
| 0 | 2568 jint result = 0; |
| 2569 | |
| 2570 if (is_linked()) { | |
| 2571 result |= JVMTI_CLASS_STATUS_VERIFIED | JVMTI_CLASS_STATUS_PREPARED; | |
| 2572 } | |
| 2573 | |
| 2574 if (is_initialized()) { | |
| 2575 assert(is_linked(), "Class status is not consistent"); | |
| 2576 result |= JVMTI_CLASS_STATUS_INITIALIZED; | |
| 2577 } | |
| 2578 if (is_in_error_state()) { | |
| 2579 result |= JVMTI_CLASS_STATUS_ERROR; | |
| 2580 } | |
| 2581 return result; | |
| 2582 } | |
| 2583 | |
|
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2584 Method* InstanceKlass::method_at_itable(Klass* holder, int index, TRAPS) { |
| 0 | 2585 itableOffsetEntry* ioe = (itableOffsetEntry*)start_of_itable(); |
| 2586 int method_table_offset_in_words = ioe->offset()/wordSize; | |
| 2587 int nof_interfaces = (method_table_offset_in_words - itable_offset_in_words()) | |
| 2588 / itableOffsetEntry::size(); | |
| 2589 | |
| 2590 for (int cnt = 0 ; ; cnt ++, ioe ++) { | |
| 605 | 2591 // If the interface isn't implemented by the receiver class, |
| 0 | 2592 // the VM should throw IncompatibleClassChangeError. |
| 2593 if (cnt >= nof_interfaces) { | |
|
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2594 THROW_NULL(vmSymbols::java_lang_IncompatibleClassChangeError()); |
| 0 | 2595 } |
| 2596 | |
|
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2597 Klass* ik = ioe->interface_klass(); |
| 0 | 2598 if (ik == holder) break; |
| 2599 } | |
| 2600 | |
|
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2601 itableMethodEntry* ime = ioe->first_method_entry(this); |
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2602 Method* m = ime[index].method(); |
| 0 | 2603 if (m == NULL) { |
|
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2604 THROW_NULL(vmSymbols::java_lang_AbstractMethodError()); |
| 0 | 2605 } |
| 2606 return m; | |
| 2607 } | |
| 2608 | |
| 2609 // On-stack replacement stuff | |
|
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2610 void InstanceKlass::add_osr_nmethod(nmethod* n) { |
| 0 | 2611 // only one compilation can be active |
| 2612 NEEDS_CLEANUP | |
| 2613 // This is a short non-blocking critical region, so the no safepoint check is ok. | |
| 2614 OsrList_lock->lock_without_safepoint_check(); | |
| 2615 assert(n->is_osr_method(), "wrong kind of nmethod"); | |
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2616 n->set_osr_link(osr_nmethods_head()); |
| 0 | 2617 set_osr_nmethods_head(n); |
| 1783 | 2618 // Raise the highest osr level if necessary |
| 2619 if (TieredCompilation) { | |
|
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2620 Method* m = n->method(); |
| 1783 | 2621 m->set_highest_osr_comp_level(MAX2(m->highest_osr_comp_level(), n->comp_level())); |
| 2622 } | |
| 0 | 2623 // Remember to unlock again |
| 2624 OsrList_lock->unlock(); | |
| 1783 | 2625 |
| 2626 // Get rid of the osr methods for the same bci that have lower levels. | |
| 2627 if (TieredCompilation) { | |
| 2628 for (int l = CompLevel_limited_profile; l < n->comp_level(); l++) { | |
| 2629 nmethod *inv = lookup_osr_nmethod(n->method(), n->osr_entry_bci(), l, true); | |
| 2630 if (inv != NULL && inv->is_in_use()) { | |
| 2631 inv->make_not_entrant(); | |
| 2632 } | |
| 2633 } | |
| 2634 } | |
| 0 | 2635 } |
| 2636 | |
| 2637 | |
|
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2638 void InstanceKlass::remove_osr_nmethod(nmethod* n) { |
| 0 | 2639 // This is a short non-blocking critical region, so the no safepoint check is ok. |
| 2640 OsrList_lock->lock_without_safepoint_check(); | |
| 2641 assert(n->is_osr_method(), "wrong kind of nmethod"); | |
| 2642 nmethod* last = NULL; | |
| 2643 nmethod* cur = osr_nmethods_head(); | |
| 1783 | 2644 int max_level = CompLevel_none; // Find the max comp level excluding n |
|
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2645 Method* m = n->method(); |
| 0 | 2646 // Search for match |
| 2647 while(cur != NULL && cur != n) { | |
| 1783 | 2648 if (TieredCompilation) { |
| 2649 // Find max level before n | |
| 2650 max_level = MAX2(max_level, cur->comp_level()); | |
| 2651 } | |
| 0 | 2652 last = cur; |
|
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2653 cur = cur->osr_link(); |
| 0 | 2654 } |
| 1783 | 2655 nmethod* next = NULL; |
| 0 | 2656 if (cur == n) { |
| 1783 | 2657 next = cur->osr_link(); |
| 0 | 2658 if (last == NULL) { |
| 2659 // Remove first element | |
| 1783 | 2660 set_osr_nmethods_head(next); |
| 0 | 2661 } else { |
| 1783 | 2662 last->set_osr_link(next); |
| 0 | 2663 } |
| 2664 } | |
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2665 n->set_osr_link(NULL); |
| 1783 | 2666 if (TieredCompilation) { |
| 2667 cur = next; | |
| 2668 while (cur != NULL) { | |
| 2669 // Find max level after n | |
| 2670 max_level = MAX2(max_level, cur->comp_level()); | |
| 2671 cur = cur->osr_link(); | |
| 2672 } | |
| 2673 m->set_highest_osr_comp_level(max_level); | |
| 2674 } | |
| 0 | 2675 // Remember to unlock again |
| 2676 OsrList_lock->unlock(); | |
| 2677 } | |
| 2678 | |
|
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2679 nmethod* InstanceKlass::lookup_osr_nmethod(Method* const m, int bci, int comp_level, bool match_level) const { |
| 0 | 2680 // This is a short non-blocking critical region, so the no safepoint check is ok. |
| 2681 OsrList_lock->lock_without_safepoint_check(); | |
| 2682 nmethod* osr = osr_nmethods_head(); | |
| 1783 | 2683 nmethod* best = NULL; |
| 0 | 2684 while (osr != NULL) { |
| 2685 assert(osr->is_osr_method(), "wrong kind of nmethod found in chain"); | |
| 1783 | 2686 // There can be a time when a c1 osr method exists but we are waiting |
| 2687 // for a c2 version. When c2 completes its osr nmethod we will trash | |
| 2688 // the c1 version and only be able to find the c2 version. However | |
| 2689 // while we overflow in the c1 code at back branches we don't want to | |
| 2690 // try and switch to the same code as we are already running | |
| 2691 | |
| 0 | 2692 if (osr->method() == m && |
| 2693 (bci == InvocationEntryBci || osr->osr_entry_bci() == bci)) { | |
| 1783 | 2694 if (match_level) { |
| 2695 if (osr->comp_level() == comp_level) { | |
| 2696 // Found a match - return it. | |
| 2697 OsrList_lock->unlock(); | |
| 2698 return osr; | |
| 2699 } | |
| 2700 } else { | |
| 2701 if (best == NULL || (osr->comp_level() > best->comp_level())) { | |
| 2702 if (osr->comp_level() == CompLevel_highest_tier) { | |
| 2703 // Found the best possible - return it. | |
| 2704 OsrList_lock->unlock(); | |
| 2705 return osr; | |
| 2706 } | |
| 2707 best = osr; | |
| 2708 } | |
| 2709 } | |
| 0 | 2710 } |
|
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2711 osr = osr->osr_link(); |
| 0 | 2712 } |
| 2713 OsrList_lock->unlock(); | |
| 1783 | 2714 if (best != NULL && best->comp_level() >= comp_level && match_level == false) { |
| 2715 return best; | |
| 2716 } | |
| 0 | 2717 return NULL; |
| 2718 } | |
| 2719 | |
| 2720 // ----------------------------------------------------------------------------------------------------- | |
|
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2721 // Printing |
|
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2722 |
| 0 | 2723 #ifndef PRODUCT |
| 2724 | |
|
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|
2725 #define BULLET " - " |
|
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2726 |
|
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2727 static const char* state_names[] = { |
|
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2728 "allocated", "loaded", "linked", "being_initialized", "fully_initialized", "initialization_error" |
|
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2729 }; |
|
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2730 |
|
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2731 void InstanceKlass::print_on(outputStream* st) const { |
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2732 assert(is_klass(), "must be klass"); |
|
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2733 Klass::print_on(st); |
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2734 |
|
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2735 st->print(BULLET"instance size: %d", size_helper()); st->cr(); |
|
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2736 st->print(BULLET"klass size: %d", size()); st->cr(); |
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2737 st->print(BULLET"access: "); access_flags().print_on(st); st->cr(); |
|
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2738 st->print(BULLET"state: "); st->print_cr(state_names[_init_state]); |
|
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2739 st->print(BULLET"name: "); name()->print_value_on(st); st->cr(); |
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2740 st->print(BULLET"super: "); super()->print_value_on_maybe_null(st); st->cr(); |
|
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2741 st->print(BULLET"sub: "); |
|
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2742 Klass* sub = subklass(); |
|
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2743 int n; |
|
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2744 for (n = 0; sub != NULL; n++, sub = sub->next_sibling()) { |
|
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2745 if (n < MaxSubklassPrintSize) { |
|
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2746 sub->print_value_on(st); |
|
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2747 st->print(" "); |
|
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|
2748 } |
|
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|
2749 } |
|
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2750 if (n >= MaxSubklassPrintSize) st->print("(%d more klasses...)", n - MaxSubklassPrintSize); |
|
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2751 st->cr(); |
|
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2752 |
|
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2753 if (is_interface()) { |
|
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2754 st->print_cr(BULLET"nof implementors: %d", nof_implementors()); |
|
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2755 if (nof_implementors() == 1) { |
|
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2756 st->print_cr(BULLET"implementor: "); |
|
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2757 st->print(" "); |
|
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2758 implementor()->print_value_on(st); |
|
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|
2759 st->cr(); |
|
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|
2760 } |
|
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|
2761 } |
|
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|
2762 |
|
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|
2763 st->print(BULLET"arrays: "); array_klasses()->print_value_on_maybe_null(st); st->cr(); |
|
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2764 st->print(BULLET"methods: "); methods()->print_value_on(st); st->cr(); |
|
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2765 if (Verbose) { |
|
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2766 Array<Method*>* method_array = methods(); |
|
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2767 for(int i = 0; i < method_array->length(); i++) { |
|
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2768 st->print("%d : ", i); method_array->at(i)->print_value(); st->cr(); |
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|
2769 } |
|
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|
2770 } |
|
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2771 st->print(BULLET"method ordering: "); method_ordering()->print_value_on(st); st->cr(); |
|
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2772 st->print(BULLET"local interfaces: "); local_interfaces()->print_value_on(st); st->cr(); |
|
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2773 st->print(BULLET"trans. interfaces: "); transitive_interfaces()->print_value_on(st); st->cr(); |
|
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2774 st->print(BULLET"constants: "); constants()->print_value_on(st); st->cr(); |
|
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|
2775 if (class_loader_data() != NULL) { |
|
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2776 st->print(BULLET"class loader data: "); |
|
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|
2777 class_loader_data()->print_value_on(st); |
|
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|
2778 st->cr(); |
|
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|
2779 } |
|
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|
2780 st->print(BULLET"protection domain: "); ((InstanceKlass*)this)->protection_domain()->print_value_on(st); st->cr(); |
|
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2781 st->print(BULLET"host class: "); host_klass()->print_value_on_maybe_null(st); st->cr(); |
|
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2782 st->print(BULLET"signers: "); signers()->print_value_on(st); st->cr(); |
|
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2783 st->print(BULLET"init_lock: "); ((oop)init_lock())->print_value_on(st); st->cr(); |
|
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2784 if (source_file_name() != NULL) { |
|
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|
2785 st->print(BULLET"source file: "); |
|
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|
2786 source_file_name()->print_value_on(st); |
|
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|
2787 st->cr(); |
|
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|
2788 } |
|
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|
2789 if (source_debug_extension() != NULL) { |
|
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|
2790 st->print(BULLET"source debug extension: "); |
|
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|
2791 st->print("%s", source_debug_extension()); |
|
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|
2792 st->cr(); |
|
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|
2793 } |
|
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|
2794 st->print(BULLET"annotations: "); annotations()->print_value_on(st); st->cr(); |
|
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|
2795 { |
|
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|
2796 ResourceMark rm; |
|
da91efe96a93
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|
2797 // PreviousVersionInfo objects returned via PreviousVersionWalker |
|
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|
2798 // contain a GrowableArray of handles. We have to clean up the |
|
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|
2799 // GrowableArray _after_ the PreviousVersionWalker destructor |
|
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|
2800 // has destroyed the handles. |
|
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|
2801 { |
|
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|
2802 bool have_pv = false; |
|
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|
2803 PreviousVersionWalker pvw((InstanceKlass*)this); |
|
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|
2804 for (PreviousVersionInfo * pv_info = pvw.next_previous_version(); |
|
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|
2805 pv_info != NULL; pv_info = pvw.next_previous_version()) { |
|
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|
2806 if (!have_pv) |
|
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|
2807 st->print(BULLET"previous version: "); |
|
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|
2808 have_pv = true; |
|
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|
2809 pv_info->prev_constant_pool_handle()()->print_value_on(st); |
|
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|
2810 } |
|
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|
2811 if (have_pv) st->cr(); |
|
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|
2812 } // pvw is cleaned up |
|
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|
2813 } // rm is cleaned up |
|
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|
2814 |
|
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|
2815 if (generic_signature() != NULL) { |
|
da91efe96a93
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|
2816 st->print(BULLET"generic signature: "); |
|
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changeset
|
2817 generic_signature()->print_value_on(st); |
|
da91efe96a93
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|
2818 st->cr(); |
|
da91efe96a93
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|
2819 } |
|
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|
2820 st->print(BULLET"inner classes: "); inner_classes()->print_value_on(st); st->cr(); |
|
da91efe96a93
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|
2821 st->print(BULLET"java mirror: "); java_mirror()->print_value_on(st); st->cr(); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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|
2822 st->print(BULLET"vtable length %d (start addr: " INTPTR_FORMAT ")", vtable_length(), start_of_vtable()); st->cr(); |
|
da91efe96a93
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diff
changeset
|
2823 st->print(BULLET"itable length %d (start addr: " INTPTR_FORMAT ")", itable_length(), start_of_itable()); st->cr(); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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|
2824 st->print_cr(BULLET"---- static fields (%d words):", static_field_size()); |
|
da91efe96a93
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diff
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|
2825 FieldPrinter print_static_field(st); |
|
da91efe96a93
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diff
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|
2826 ((InstanceKlass*)this)->do_local_static_fields(&print_static_field); |
|
da91efe96a93
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|
2827 st->print_cr(BULLET"---- non-static fields (%d words):", nonstatic_field_size()); |
|
da91efe96a93
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|
2828 FieldPrinter print_nonstatic_field(st); |
|
da91efe96a93
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diff
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|
2829 ((InstanceKlass*)this)->do_nonstatic_fields(&print_nonstatic_field); |
|
da91efe96a93
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|
2830 |
|
da91efe96a93
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|
2831 st->print(BULLET"non-static oop maps: "); |
|
da91efe96a93
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coleenp
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diff
changeset
|
2832 OopMapBlock* map = start_of_nonstatic_oop_maps(); |
|
da91efe96a93
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coleenp
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diff
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|
2833 OopMapBlock* end_map = map + nonstatic_oop_map_count(); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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diff
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|
2834 while (map < end_map) { |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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|
2835 st->print("%d-%d ", map->offset(), map->offset() + heapOopSize*(map->count() - 1)); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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changeset
|
2836 map++; |
|
da91efe96a93
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diff
changeset
|
2837 } |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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diff
changeset
|
2838 st->cr(); |
|
da91efe96a93
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diff
changeset
|
2839 } |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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diff
changeset
|
2840 |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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diff
changeset
|
2841 #endif //PRODUCT |
|
da91efe96a93
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diff
changeset
|
2842 |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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diff
changeset
|
2843 void InstanceKlass::print_value_on(outputStream* st) const { |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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diff
changeset
|
2844 assert(is_klass(), "must be klass"); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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diff
changeset
|
2845 name()->print_value_on(st); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff
changeset
|
2846 } |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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diff
changeset
|
2847 |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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diff
changeset
|
2848 #ifndef PRODUCT |
|
da91efe96a93
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diff
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|
2849 |
| 0 | 2850 void FieldPrinter::do_field(fieldDescriptor* fd) { |
|
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2851 _st->print(BULLET); |
|
2376
c7f3d0b4570f
7017732: move static fields into Class to prepare for perm gen removal
never
parents:
2357
diff
changeset
|
2852 if (_obj == NULL) { |
| 0 | 2853 fd->print_on(_st); |
| 2854 _st->cr(); | |
| 2855 } else { | |
| 2856 fd->print_on_for(_st, _obj); | |
| 2857 _st->cr(); | |
| 2858 } | |
| 2859 } | |
| 2860 | |
| 2861 | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2862 void InstanceKlass::oop_print_on(oop obj, outputStream* st) { |
| 0 | 2863 Klass::oop_print_on(obj, st); |
| 2864 | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6266
diff
changeset
|
2865 if (this == SystemDictionary::String_klass()) { |
| 0 | 2866 typeArrayOop value = java_lang_String::value(obj); |
| 2867 juint offset = java_lang_String::offset(obj); | |
| 2868 juint length = java_lang_String::length(obj); | |
| 2869 if (value != NULL && | |
| 2870 value->is_typeArray() && | |
| 2871 offset <= (juint) value->length() && | |
| 2872 offset + length <= (juint) value->length()) { | |
|
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2873 st->print(BULLET"string: "); |
| 0 | 2874 Handle h_obj(obj); |
| 2875 java_lang_String::print(h_obj, st); | |
| 2876 st->cr(); | |
| 2877 if (!WizardMode) return; // that is enough | |
| 2878 } | |
| 2879 } | |
| 2880 | |
|
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2881 st->print_cr(BULLET"---- fields (total size %d words):", oop_size(obj)); |
|
2376
c7f3d0b4570f
7017732: move static fields into Class to prepare for perm gen removal
never
parents:
2357
diff
changeset
|
2882 FieldPrinter print_field(st, obj); |
|
c7f3d0b4570f
7017732: move static fields into Class to prepare for perm gen removal
never
parents:
2357
diff
changeset
|
2883 do_nonstatic_fields(&print_field); |
| 0 | 2884 |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6266
diff
changeset
|
2885 if (this == SystemDictionary::Class_klass()) { |
|
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2886 st->print(BULLET"signature: "); |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2887 java_lang_Class::print_signature(obj, st); |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2888 st->cr(); |
|
6725
da91efe96a93
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coleenp
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6266
diff
changeset
|
2889 Klass* mirrored_klass = java_lang_Class::as_Klass(obj); |
|
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2890 st->print(BULLET"fake entry for mirror: "); |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6266
diff
changeset
|
2891 mirrored_klass->print_value_on_maybe_null(st); |
| 0 | 2892 st->cr(); |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6266
diff
changeset
|
2893 Klass* array_klass = java_lang_Class::array_klass(obj); |
|
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2894 st->print(BULLET"fake entry for array: "); |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6266
diff
changeset
|
2895 array_klass->print_value_on_maybe_null(st); |
| 0 | 2896 st->cr(); |
|
2376
c7f3d0b4570f
7017732: move static fields into Class to prepare for perm gen removal
never
parents:
2357
diff
changeset
|
2897 st->print_cr(BULLET"fake entry for oop_size: %d", java_lang_Class::oop_size(obj)); |
|
c7f3d0b4570f
7017732: move static fields into Class to prepare for perm gen removal
never
parents:
2357
diff
changeset
|
2898 st->print_cr(BULLET"fake entry for static_oop_field_count: %d", java_lang_Class::static_oop_field_count(obj)); |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6266
diff
changeset
|
2899 Klass* real_klass = java_lang_Class::as_Klass(obj); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6266
diff
changeset
|
2900 if (real_klass != NULL && real_klass->oop_is_instance()) { |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6266
diff
changeset
|
2901 InstanceKlass::cast(real_klass)->do_local_static_fields(&print_field); |
|
2376
c7f3d0b4570f
7017732: move static fields into Class to prepare for perm gen removal
never
parents:
2357
diff
changeset
|
2902 } |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6266
diff
changeset
|
2903 } else if (this == SystemDictionary::MethodType_klass()) { |
|
1039
987e948ebbc8
6815692: method handle code needs some cleanup (post-6655638)
jrose
parents:
997
diff
changeset
|
2904 st->print(BULLET"signature: "); |
|
2357
8033953d67ff
7012648: move JSR 292 to package java.lang.invoke and adjust names
jrose
parents:
2334
diff
changeset
|
2905 java_lang_invoke_MethodType::print_signature(obj, st); |
|
1039
987e948ebbc8
6815692: method handle code needs some cleanup (post-6655638)
jrose
parents:
997
diff
changeset
|
2906 st->cr(); |
| 0 | 2907 } |
| 2908 } | |
| 2909 | |
|
6948
e522a00b91aa
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
Doug Simon <doug.simon@oracle.com>
diff
changeset
|
2910 #endif |
|
1155
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1144
diff
changeset
|
2911 |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6266
diff
changeset
|
2912 void InstanceKlass::oop_print_value_on(oop obj, outputStream* st) { |
| 0 | 2913 st->print("a "); |
| 2914 name()->print_value_on(st); | |
| 2915 obj->print_address_on(st); | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6266
diff
changeset
|
2916 if (this == SystemDictionary::String_klass() |
|
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2917 && java_lang_String::value(obj) != NULL) { |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2918 ResourceMark rm; |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2919 int len = java_lang_String::length(obj); |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2920 int plen = (len < 24 ? len : 12); |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2921 char* str = java_lang_String::as_utf8_string(obj, 0, plen); |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2922 st->print(" = \"%s\"", str); |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2923 if (len > plen) |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2924 st->print("...[%d]", len); |
|
6725
da91efe96a93
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|
2925 } else if (this == SystemDictionary::Class_klass()) { |
|
da91efe96a93
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|
2926 Klass* k = java_lang_Class::as_Klass(obj); |
|
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
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605
diff
changeset
|
2927 st->print(" = "); |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
parents:
605
diff
changeset
|
2928 if (k != NULL) { |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
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diff
changeset
|
2929 k->print_value_on(st); |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
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diff
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|
2930 } else { |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
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diff
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|
2931 const char* tname = type2name(java_lang_Class::primitive_type(obj)); |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
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diff
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|
2932 st->print("%s", tname ? tname : "type?"); |
|
c89f86385056
6814659: separable cleanups and subroutines for 6655638
jrose
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diff
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|
2933 } |
|
6725
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|
2934 } else if (this == SystemDictionary::MethodType_klass()) { |
|
1039
987e948ebbc8
6815692: method handle code needs some cleanup (post-6655638)
jrose
parents:
997
diff
changeset
|
2935 st->print(" = "); |
|
2357
8033953d67ff
7012648: move JSR 292 to package java.lang.invoke and adjust names
jrose
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2334
diff
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|
2936 java_lang_invoke_MethodType::print_signature(obj, st); |
|
665
c89f86385056
6814659: separable cleanups and subroutines for 6655638
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parents:
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diff
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|
2937 } else if (java_lang_boxing_object::is_instance(obj)) { |
|
c89f86385056
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parents:
605
diff
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|
2938 st->print(" = "); |
|
c89f86385056
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jrose
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diff
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|
2939 java_lang_boxing_object::print(obj, st); |
|
6725
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|
2940 } else if (this == SystemDictionary::LambdaForm_klass()) { |
|
6266
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7023639: JSR 292 method handle invocation needs a fast path for compiled code
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|
2941 oop vmentry = java_lang_invoke_LambdaForm::vmentry(obj); |
|
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
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diff
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|
2942 if (vmentry != NULL) { |
|
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
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diff
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|
2943 st->print(" => "); |
|
1d7922586cf6
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|
2944 vmentry->print_value_on(st); |
|
1d7922586cf6
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|
2945 } |
|
6725
da91efe96a93
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|
2946 } else if (this == SystemDictionary::MemberName_klass()) { |
|
da91efe96a93
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|
2947 Metadata* vmtarget = java_lang_invoke_MemberName::vmtarget(obj); |
|
6266
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diff
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|
2948 if (vmtarget != NULL) { |
|
1d7922586cf6
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diff
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|
2949 st->print(" = "); |
|
1d7922586cf6
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|
2950 vmtarget->print_value_on(st); |
|
1d7922586cf6
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|
2951 } else { |
|
1d7922586cf6
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diff
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|
2952 java_lang_invoke_MemberName::clazz(obj)->print_value_on(st); |
|
1d7922586cf6
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twisti
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|
2953 st->print("."); |
|
1d7922586cf6
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6203
diff
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|
2954 java_lang_invoke_MemberName::name(obj)->print_value_on(st); |
|
1d7922586cf6
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twisti
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|
2955 } |
|
665
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|
2956 } |
| 0 | 2957 } |
| 2958 | |
|
6725
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|
2959 const char* InstanceKlass::internal_name() const { |
| 0 | 2960 return external_name(); |
| 2961 } | |
| 2962 | |
| 2963 // Verification | |
| 2964 | |
| 2965 class VerifyFieldClosure: public OopClosure { | |
|
113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
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diff
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|
2966 protected: |
|
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
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diff
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|
2967 template <class T> void do_oop_work(T* p) { |
|
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
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diff
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|
2968 oop obj = oopDesc::load_decode_heap_oop(p); |
|
ba764ed4b6f2
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coleenp
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52
diff
changeset
|
2969 if (!obj->is_oop_or_null()) { |
|
ba764ed4b6f2
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parents:
52
diff
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|
2970 tty->print_cr("Failed: " PTR_FORMAT " -> " PTR_FORMAT, p, (address)obj); |
| 0 | 2971 Universe::print(); |
| 2972 guarantee(false, "boom"); | |
| 2973 } | |
| 2974 } | |
|
113
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|
2975 public: |
|
ba764ed4b6f2
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coleenp
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52
diff
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|
2976 virtual void do_oop(oop* p) { VerifyFieldClosure::do_oop_work(p); } |
|
ba764ed4b6f2
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52
diff
changeset
|
2977 virtual void do_oop(narrowOop* p) { VerifyFieldClosure::do_oop_work(p); } |
| 0 | 2978 }; |
| 2979 | |
|
6725
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|
2980 void InstanceKlass::verify_on(outputStream* st) { |
|
da91efe96a93
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|
2981 Klass::verify_on(st); |
|
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|
2982 Thread *thread = Thread::current(); |
|
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|
2983 |
|
da91efe96a93
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|
2984 #ifndef PRODUCT |
|
da91efe96a93
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|
2985 // Avoid redundant verifies |
|
da91efe96a93
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|
2986 if (_verify_count == Universe::verify_count()) return; |
|
da91efe96a93
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|
2987 _verify_count = Universe::verify_count(); |
|
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|
2988 #endif |
|
da91efe96a93
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|
2989 // Verify that klass is present in SystemDictionary |
|
da91efe96a93
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|
2990 if (is_loaded() && !is_anonymous()) { |
|
da91efe96a93
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|
2991 Symbol* h_name = name(); |
|
da91efe96a93
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coleenp
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|
2992 SystemDictionary::verify_obj_klass_present(h_name, class_loader_data()); |
|
da91efe96a93
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coleenp
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|
2993 } |
|
da91efe96a93
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diff
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|
2994 |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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diff
changeset
|
2995 // Verify static fields |
|
da91efe96a93
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coleenp
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diff
changeset
|
2996 VerifyFieldClosure blk; |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff
changeset
|
2997 |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2998 // Verify vtables |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6266
diff
changeset
|
2999 if (is_linked()) { |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6266
diff
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|
3000 ResourceMark rm(thread); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
3001 // $$$ This used to be done only for m/s collections. Doing it |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
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|
3002 // always seemed a valid generalization. (DLD -- 6/00) |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6266
diff
changeset
|
3003 vtable()->verify(st); |
|
da91efe96a93
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6266
diff
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|
3004 } |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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6266
diff
changeset
|
3005 |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6266
diff
changeset
|
3006 // Verify first subklass |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
3007 if (subklass_oop() != NULL) { |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6266
diff
changeset
|
3008 guarantee(subklass_oop()->is_metadata(), "should be in metaspace"); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff
changeset
|
3009 guarantee(subklass_oop()->is_klass(), "should be klass"); |
|
da91efe96a93
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coleenp
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diff
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|
3010 } |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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diff
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|
3011 |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6266
diff
changeset
|
3012 // Verify siblings |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6266
diff
changeset
|
3013 Klass* super = this->super(); |
|
da91efe96a93
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coleenp
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diff
changeset
|
3014 Klass* sib = next_sibling(); |
|
da91efe96a93
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coleenp
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6266
diff
changeset
|
3015 if (sib != NULL) { |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff
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|
3016 if (sib == this) { |
|
da91efe96a93
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coleenp
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diff
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|
3017 fatal(err_msg("subclass points to itself " PTR_FORMAT, sib)); |
|
da91efe96a93
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6266
diff
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|
3018 } |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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6266
diff
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|
3019 |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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diff
changeset
|
3020 guarantee(sib->is_metadata(), "should be in metaspace"); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff
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|
3021 guarantee(sib->is_klass(), "should be klass"); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff
changeset
|
3022 guarantee(sib->super() == super, "siblings should have same superklass"); |
|
da91efe96a93
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coleenp
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6266
diff
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|
3023 } |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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6266
diff
changeset
|
3024 |
|
da91efe96a93
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6266
diff
changeset
|
3025 // Verify implementor fields |
|
da91efe96a93
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coleenp
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6266
diff
changeset
|
3026 Klass* im = implementor(); |
|
da91efe96a93
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coleenp
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diff
changeset
|
3027 if (im != NULL) { |
|
da91efe96a93
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coleenp
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6266
diff
changeset
|
3028 guarantee(is_interface(), "only interfaces should have implementor set"); |
|
da91efe96a93
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coleenp
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6266
diff
changeset
|
3029 guarantee(im->is_klass(), "should be klass"); |
| 6983 | 3030 guarantee(!im->is_interface() || im == this, |
|
6725
da91efe96a93
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6266
diff
changeset
|
3031 "implementors cannot be interfaces"); |
|
da91efe96a93
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coleenp
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6266
diff
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|
3032 } |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6266
diff
changeset
|
3033 |
|
da91efe96a93
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coleenp
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6266
diff
changeset
|
3034 // Verify local interfaces |
|
da91efe96a93
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6266
diff
changeset
|
3035 if (local_interfaces()) { |
|
da91efe96a93
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diff
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|
3036 Array<Klass*>* local_interfaces = this->local_interfaces(); |
|
da91efe96a93
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diff
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|
3037 for (int j = 0; j < local_interfaces->length(); j++) { |
|
da91efe96a93
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coleenp
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diff
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|
3038 Klass* e = local_interfaces->at(j); |
| 6983 | 3039 guarantee(e->is_klass() && e->is_interface(), "invalid local interface"); |
|
6725
da91efe96a93
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diff
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|
3040 } |
|
da91efe96a93
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6266
diff
changeset
|
3041 } |
|
da91efe96a93
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diff
changeset
|
3042 |
|
da91efe96a93
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diff
changeset
|
3043 // Verify transitive interfaces |
|
da91efe96a93
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coleenp
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diff
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|
3044 if (transitive_interfaces() != NULL) { |
|
da91efe96a93
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diff
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|
3045 Array<Klass*>* transitive_interfaces = this->transitive_interfaces(); |
|
da91efe96a93
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coleenp
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|
3046 for (int j = 0; j < transitive_interfaces->length(); j++) { |
|
da91efe96a93
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coleenp
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|
3047 Klass* e = transitive_interfaces->at(j); |
| 6983 | 3048 guarantee(e->is_klass() && e->is_interface(), "invalid transitive interface"); |
|
6725
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|
3049 } |
|
da91efe96a93
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|
3050 } |
|
da91efe96a93
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|
3051 |
|
da91efe96a93
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diff
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|
3052 // Verify methods |
|
da91efe96a93
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changeset
|
3053 if (methods() != NULL) { |
|
da91efe96a93
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|
3054 Array<Method*>* methods = this->methods(); |
|
da91efe96a93
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changeset
|
3055 for (int j = 0; j < methods->length(); j++) { |
|
da91efe96a93
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|
3056 guarantee(methods->at(j)->is_metadata(), "should be in metaspace"); |
|
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3057 guarantee(methods->at(j)->is_method(), "non-method in methods array"); |
|
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3058 } |
|
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3059 for (int j = 0; j < methods->length() - 1; j++) { |
|
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3060 Method* m1 = methods->at(j); |
|
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3061 Method* m2 = methods->at(j + 1); |
|
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3062 guarantee(m1->name()->fast_compare(m2->name()) <= 0, "methods not sorted correctly"); |
|
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3063 } |
|
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3064 } |
|
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3065 |
|
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3066 // Verify method ordering |
|
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3067 if (method_ordering() != NULL) { |
|
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3068 Array<int>* method_ordering = this->method_ordering(); |
|
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3069 int length = method_ordering->length(); |
|
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3070 if (JvmtiExport::can_maintain_original_method_order() || |
|
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3071 (UseSharedSpaces && length != 0)) { |
|
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3072 guarantee(length == methods()->length(), "invalid method ordering length"); |
|
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3073 jlong sum = 0; |
|
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3074 for (int j = 0; j < length; j++) { |
|
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3075 int original_index = method_ordering->at(j); |
|
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3076 guarantee(original_index >= 0, "invalid method ordering index"); |
|
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3077 guarantee(original_index < length, "invalid method ordering index"); |
|
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3078 sum += original_index; |
|
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3079 } |
|
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3080 // Verify sum of indices 0,1,...,length-1 |
|
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3081 guarantee(sum == ((jlong)length*(length-1))/2, "invalid method ordering sum"); |
|
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3082 } else { |
|
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3083 guarantee(length == 0, "invalid method ordering length"); |
|
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3084 } |
|
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|
3085 } |
|
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|
3086 |
|
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|
3087 // Verify JNI static field identifiers |
|
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3088 if (jni_ids() != NULL) { |
|
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3089 jni_ids()->verify(this); |
|
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3090 } |
|
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|
3091 |
|
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|
3092 // Verify other fields |
|
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|
3093 if (array_klasses() != NULL) { |
|
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|
3094 guarantee(array_klasses()->is_metadata(), "should be in metaspace"); |
|
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|
3095 guarantee(array_klasses()->is_klass(), "should be klass"); |
|
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|
3096 } |
|
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|
3097 if (constants() != NULL) { |
|
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|
3098 guarantee(constants()->is_metadata(), "should be in metaspace"); |
|
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|
3099 guarantee(constants()->is_constantPool(), "should be constant pool"); |
|
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|
3100 } |
|
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|
3101 if (protection_domain() != NULL) { |
|
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|
3102 guarantee(protection_domain()->is_oop(), "should be oop"); |
|
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|
3103 } |
|
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|
3104 if (host_klass() != NULL) { |
|
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|
3105 guarantee(host_klass()->is_metadata(), "should be in metaspace"); |
|
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|
3106 guarantee(host_klass()->is_klass(), "should be klass"); |
|
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|
3107 } |
|
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|
3108 if (signers() != NULL) { |
|
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|
3109 guarantee(signers()->is_objArray(), "should be obj array"); |
|
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|
3110 } |
|
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|
3111 } |
|
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|
3112 |
|
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|
3113 void InstanceKlass::oop_verify_on(oop obj, outputStream* st) { |
| 0 | 3114 Klass::oop_verify_on(obj, st); |
| 3115 VerifyFieldClosure blk; | |
|
6725
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|
3116 obj->oop_iterate_no_header(&blk); |
| 0 | 3117 } |
| 3118 | |
|
6725
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|
3119 |
|
113
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|
3120 // JNIid class for jfieldIDs only |
|
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|
3121 // Note to reviewers: |
|
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|
3122 // These JNI functions are just moved over to column 1 and not changed |
|
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|
3123 // in the compressed oops workspace. |
|
6725
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|
3124 JNIid::JNIid(Klass* holder, int offset, JNIid* next) { |
|
113
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|
3125 _holder = holder; |
|
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|
3126 _offset = offset; |
|
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|
3127 _next = next; |
|
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|
3128 debug_only(_is_static_field_id = false;) |
|
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|
3129 } |
| 0 | 3130 |
| 3131 | |
|
113
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|
3132 JNIid* JNIid::find(int offset) { |
|
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|
3133 JNIid* current = this; |
|
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|
3134 while (current != NULL) { |
|
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|
3135 if (current->offset() == offset) return current; |
|
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|
3136 current = current->next(); |
|
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|
3137 } |
|
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|
3138 return NULL; |
|
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|
3139 } |
| 0 | 3140 |
| 3141 void JNIid::deallocate(JNIid* current) { | |
|
113
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|
3142 while (current != NULL) { |
|
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diff
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|
3143 JNIid* next = current->next(); |
|
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|
3144 delete current; |
|
ba764ed4b6f2
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diff
changeset
|
3145 current = next; |
|
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diff
changeset
|
3146 } |
|
ba764ed4b6f2
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|
3147 } |
| 0 | 3148 |
| 3149 | |
|
6725
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|
3150 void JNIid::verify(Klass* holder) { |
|
6735
aed758eda82a
7195833: NPG: Rename instanceClassLoaderKlass, instanceRefKlass and instanceMirrorKlass
coleenp
parents:
6733
diff
changeset
|
3151 int first_field_offset = InstanceMirrorKlass::offset_of_static_fields(); |
|
113
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|
3152 int end_field_offset; |
|
6725
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|
3153 end_field_offset = first_field_offset + (InstanceKlass::cast(holder)->static_field_size() * wordSize); |
| 0 | 3154 |
|
113
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|
3155 JNIid* current = this; |
|
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changeset
|
3156 while (current != NULL) { |
|
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changeset
|
3157 guarantee(current->holder() == holder, "Invalid klass in JNIid"); |
|
ba764ed4b6f2
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|
3158 #ifdef ASSERT |
|
ba764ed4b6f2
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|
3159 int o = current->offset(); |
|
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changeset
|
3160 if (current->is_static_field_id()) { |
|
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|
3161 guarantee(o >= first_field_offset && o < end_field_offset, "Invalid static field offset in JNIid"); |
|
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|
3162 } |
|
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|
3163 #endif |
|
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|
3164 current = current->next(); |
|
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|
3165 } |
|
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|
3166 } |
| 0 | 3167 |
| 3168 | |
| 3169 #ifdef ASSERT | |
|
6725
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|
3170 void InstanceKlass::set_init_state(ClassState state) { |
|
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|
3171 bool good_state = is_shared() ? (_init_state <= state) |
|
113
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|
3172 : (_init_state < state); |
|
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|
3173 assert(good_state || state == allocated, "illegal state transition"); |
|
4739
52b5d32fbfaf
7117052: instanceKlass::_init_state can be u1 type
coleenp
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4006
diff
changeset
|
3174 _init_state = (u1)state; |
|
113
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|
3175 } |
| 0 | 3176 #endif |
| 3177 | |
| 3178 | |
| 3179 // RedefineClasses() support for previous versions: | |
| 3180 | |
|
6725
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|
3181 // Purge previous versions |
|
da91efe96a93
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|
3182 static void purge_previous_versions_internal(InstanceKlass* ik, int emcp_method_count) { |
|
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|
3183 if (ik->previous_versions() != NULL) { |
|
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|
3184 // This klass has previous versions so see what we can cleanup |
|
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|
3185 // while it is safe to do so. |
|
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|
3186 |
|
da91efe96a93
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|
3187 int deleted_count = 0; // leave debugging breadcrumbs |
|
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|
3188 int live_count = 0; |
|
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3189 ClassLoaderData* loader_data = ik->class_loader_data() == NULL ? |
|
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3190 ClassLoaderData::the_null_class_loader_data() : |
|
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3191 ik->class_loader_data(); |
|
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3192 |
|
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3193 // RC_TRACE macro has an embedded ResourceMark |
|
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3194 RC_TRACE(0x00000200, ("purge: %s: previous version length=%d", |
|
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3195 ik->external_name(), ik->previous_versions()->length())); |
|
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3196 |
|
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3197 for (int i = ik->previous_versions()->length() - 1; i >= 0; i--) { |
|
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3198 // check the previous versions array |
|
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3199 PreviousVersionNode * pv_node = ik->previous_versions()->at(i); |
|
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3200 ConstantPool* cp_ref = pv_node->prev_constant_pool(); |
|
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3201 assert(cp_ref != NULL, "cp ref was unexpectedly cleared"); |
|
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3202 |
|
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3203 ConstantPool* pvcp = cp_ref; |
|
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3204 if (!pvcp->on_stack()) { |
|
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3205 // If the constant pool isn't on stack, none of the methods |
|
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3206 // are executing. Delete all the methods, the constant pool and |
|
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3207 // and this previous version node. |
|
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3208 GrowableArray<Method*>* method_refs = pv_node->prev_EMCP_methods(); |
|
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3209 if (method_refs != NULL) { |
|
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3210 for (int j = method_refs->length() - 1; j >= 0; j--) { |
|
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3211 Method* method = method_refs->at(j); |
|
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3212 assert(method != NULL, "method ref was unexpectedly cleared"); |
|
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3213 method_refs->remove_at(j); |
|
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3214 // method will be freed with associated class. |
|
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3215 } |
|
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|
3216 } |
|
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|
3217 // Remove the constant pool |
|
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|
3218 delete pv_node; |
|
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3219 // Since we are traversing the array backwards, we don't have to |
|
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|
3220 // do anything special with the index. |
|
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3221 ik->previous_versions()->remove_at(i); |
|
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3222 deleted_count++; |
|
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3223 continue; |
|
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|
3224 } else { |
|
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|
3225 RC_TRACE(0x00000200, ("purge: previous version @%d is alive", i)); |
|
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|
3226 assert(pvcp->pool_holder() != NULL, "Constant pool with no holder"); |
|
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3227 guarantee (!loader_data->is_unloading(), "unloaded classes can't be on the stack"); |
|
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|
3228 live_count++; |
|
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|
3229 } |
|
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|
3230 |
|
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3231 // At least one method is live in this previous version, clean out |
|
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3232 // the others or mark them as obsolete. |
|
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3233 GrowableArray<Method*>* method_refs = pv_node->prev_EMCP_methods(); |
|
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3234 if (method_refs != NULL) { |
|
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3235 RC_TRACE(0x00000200, ("purge: previous methods length=%d", |
|
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|
3236 method_refs->length())); |
|
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3237 for (int j = method_refs->length() - 1; j >= 0; j--) { |
|
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3238 Method* method = method_refs->at(j); |
|
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3239 assert(method != NULL, "method ref was unexpectedly cleared"); |
|
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3240 |
|
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|
3241 // Remove the emcp method if it's not executing |
|
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3242 // If it's been made obsolete by a redefinition of a non-emcp |
|
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3243 // method, mark it as obsolete but leave it to clean up later. |
|
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3244 if (!method->on_stack()) { |
|
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3245 method_refs->remove_at(j); |
|
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3246 } else if (emcp_method_count == 0) { |
|
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|
3247 method->set_is_obsolete(); |
|
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|
3248 } else { |
|
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3249 // RC_TRACE macro has an embedded ResourceMark |
|
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|
3250 RC_TRACE(0x00000200, |
|
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3251 ("purge: %s(%s): prev method @%d in version @%d is alive", |
|
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3252 method->name()->as_C_string(), |
|
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|
3253 method->signature()->as_C_string(), j, i)); |
|
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|
3254 } |
|
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|
3255 } |
|
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|
3256 } |
|
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|
3257 } |
|
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|
3258 assert(ik->previous_versions()->length() == live_count, "sanity check"); |
|
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|
3259 RC_TRACE(0x00000200, |
|
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|
3260 ("purge: previous version stats: live=%d, deleted=%d", live_count, |
|
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|
3261 deleted_count)); |
|
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|
3262 } |
|
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|
3263 } |
|
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|
3264 |
|
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|
3265 // External interface for use during class unloading. |
|
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|
3266 void InstanceKlass::purge_previous_versions(InstanceKlass* ik) { |
|
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3267 // Call with >0 emcp methods since they are not currently being redefined. |
|
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|
3268 purge_previous_versions_internal(ik, 1); |
|
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|
3269 } |
|
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|
3270 |
|
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|
3271 |
|
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|
3272 // Potentially add an information node that contains pointers to the |
| 0 | 3273 // interesting parts of the previous version of the_class. |
|
6725
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|
3274 // This is also where we clean out any unused references. |
|
977
74a5db69c1fe
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dcubed
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diff
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|
3275 // Note that while we delete nodes from the _previous_versions |
|
74a5db69c1fe
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dcubed
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diff
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|
3276 // array, we never delete the array itself until the klass is |
|
74a5db69c1fe
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dcubed
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diff
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|
3277 // unloaded. The has_been_redefined() query depends on that fact. |
|
74a5db69c1fe
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974
diff
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|
3278 // |
|
6725
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|
3279 void InstanceKlass::add_previous_version(instanceKlassHandle ikh, |
|
113
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|
3280 BitMap* emcp_methods, int emcp_method_count) { |
| 0 | 3281 assert(Thread::current()->is_VM_thread(), |
|
113
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|
3282 "only VMThread can add previous versions"); |
| 0 | 3283 |
| 3284 if (_previous_versions == NULL) { | |
| 3285 // This is the first previous version so make some space. | |
| 3286 // Start with 2 elements under the assumption that the class | |
| 3287 // won't be redefined much. | |
| 6197 | 3288 _previous_versions = new (ResourceObj::C_HEAP, mtClass) |
| 0 | 3289 GrowableArray<PreviousVersionNode *>(2, true); |
| 3290 } | |
| 3291 | |
|
6725
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|
3292 ConstantPool* cp_ref = ikh->constants(); |
|
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|
3293 |
| 0 | 3294 // RC_TRACE macro has an embedded ResourceMark |
|
6725
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|
3295 RC_TRACE(0x00000400, ("adding previous version ref for %s @%d, EMCP_cnt=%d " |
|
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|
3296 "on_stack=%d", |
|
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|
3297 ikh->external_name(), _previous_versions->length(), emcp_method_count, |
|
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|
3298 cp_ref->on_stack())); |
|
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|
3299 |
|
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|
3300 // If the constant pool for this previous version of the class |
|
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|
3301 // is not marked as being on the stack, then none of the methods |
|
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|
3302 // in this previous version of the class are on the stack so |
|
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|
3303 // we don't need to create a new PreviousVersionNode. However, |
|
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|
3304 // we still need to examine older previous versions below. |
|
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|
3305 Array<Method*>* old_methods = ikh->methods(); |
|
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|
3306 |
|
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|
3307 if (cp_ref->on_stack()) { |
| 0 | 3308 PreviousVersionNode * pv_node = NULL; |
| 3309 if (emcp_method_count == 0) { | |
|
6725
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|
3310 // non-shared ConstantPool gets a reference |
|
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|
3311 pv_node = new PreviousVersionNode(cp_ref, !cp_ref->is_shared(), NULL); |
| 0 | 3312 RC_TRACE(0x00000400, |
|
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|
3313 ("add: all methods are obsolete; flushing any EMCP refs")); |
| 0 | 3314 } else { |
| 3315 int local_count = 0; | |
|
6725
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|
3316 GrowableArray<Method*>* method_refs = new (ResourceObj::C_HEAP, mtClass) |
|
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|
3317 GrowableArray<Method*>(emcp_method_count, true); |
| 0 | 3318 for (int i = 0; i < old_methods->length(); i++) { |
| 3319 if (emcp_methods->at(i)) { | |
|
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3320 // this old method is EMCP. Save it only if it's on the stack |
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3321 Method* old_method = old_methods->at(i); |
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3322 if (old_method->on_stack()) { |
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3323 method_refs->append(old_method); |
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3324 } |
| 0 | 3325 if (++local_count >= emcp_method_count) { |
| 3326 // no more EMCP methods so bail out now | |
| 3327 break; | |
| 3328 } | |
| 3329 } | |
| 3330 } | |
|
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3331 // non-shared ConstantPool gets a reference |
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3332 pv_node = new PreviousVersionNode(cp_ref, !cp_ref->is_shared(), method_refs); |
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3333 } |
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3334 // append new previous version. |
| 0 | 3335 _previous_versions->append(pv_node); |
|
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3336 } |
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3337 |
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3338 // Since the caller is the VMThread and we are at a safepoint, this |
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|
3339 // is a good time to clear out unused references. |
| 0 | 3340 |
| 3341 RC_TRACE(0x00000400, ("add: previous version length=%d", | |
| 3342 _previous_versions->length())); | |
| 3343 | |
|
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3344 // Purge previous versions not executing on the stack |
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3345 purge_previous_versions_internal(this, emcp_method_count); |
| 0 | 3346 |
| 3347 int obsolete_method_count = old_methods->length() - emcp_method_count; | |
| 3348 | |
| 3349 if (emcp_method_count != 0 && obsolete_method_count != 0 && | |
|
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3350 _previous_versions->length() > 0) { |
|
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3351 // We have a mix of obsolete and EMCP methods so we have to |
| 0 | 3352 // clear out any matching EMCP method entries the hard way. |
| 3353 int local_count = 0; | |
| 3354 for (int i = 0; i < old_methods->length(); i++) { | |
| 3355 if (!emcp_methods->at(i)) { | |
| 3356 // only obsolete methods are interesting | |
|
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3357 Method* old_method = old_methods->at(i); |
|
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|
3358 Symbol* m_name = old_method->name(); |
|
3582bf76420e
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|
3359 Symbol* m_signature = old_method->signature(); |
| 0 | 3360 |
|
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3361 // we might not have added the last entry |
|
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3362 for (int j = _previous_versions->length() - 1; j >= 0; j--) { |
|
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3363 // check the previous versions array for non executing obsolete methods |
|
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3364 PreviousVersionNode * pv_node = _previous_versions->at(j); |
|
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3365 |
|
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3366 GrowableArray<Method*>* method_refs = pv_node->prev_EMCP_methods(); |
| 0 | 3367 if (method_refs == NULL) { |
| 3368 // We have run into a PreviousVersion generation where | |
| 3369 // all methods were made obsolete during that generation's | |
| 3370 // RedefineClasses() operation. At the time of that | |
| 3371 // operation, all EMCP methods were flushed so we don't | |
| 3372 // have to go back any further. | |
| 3373 // | |
| 3374 // A NULL method_refs is different than an empty method_refs. | |
| 3375 // We cannot infer any optimizations about older generations | |
| 3376 // from an empty method_refs for the current generation. | |
| 3377 break; | |
| 3378 } | |
| 3379 | |
| 3380 for (int k = method_refs->length() - 1; k >= 0; k--) { | |
|
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3381 Method* method = method_refs->at(k); |
|
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3382 |
|
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3383 if (!method->is_obsolete() && |
|
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|
3384 method->name() == m_name && |
| 0 | 3385 method->signature() == m_signature) { |
| 3386 // The current RedefineClasses() call has made all EMCP | |
| 3387 // versions of this method obsolete so mark it as obsolete | |
|
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|
3388 // and remove the reference. |
| 0 | 3389 RC_TRACE(0x00000400, |
| 3390 ("add: %s(%s): flush obsolete method @%d in version @%d", | |
| 3391 m_name->as_C_string(), m_signature->as_C_string(), k, j)); | |
| 3392 | |
| 3393 method->set_is_obsolete(); | |
|
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3394 // Leave obsolete methods on the previous version list to |
|
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|
3395 // clean up later. |
| 0 | 3396 break; |
| 3397 } | |
| 3398 } | |
| 3399 | |
| 3400 // The previous loop may not find a matching EMCP method, but | |
| 3401 // that doesn't mean that we can optimize and not go any | |
| 3402 // further back in the PreviousVersion generations. The EMCP | |
|
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3403 // method for this generation could have already been deleted, |
| 0 | 3404 // but there still may be an older EMCP method that has not |
|
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|
3405 // been deleted. |
| 0 | 3406 } |
| 3407 | |
| 3408 if (++local_count >= obsolete_method_count) { | |
| 3409 // no more obsolete methods so bail out now | |
| 3410 break; | |
| 3411 } | |
| 3412 } | |
| 3413 } | |
| 3414 } | |
| 3415 } // end add_previous_version() | |
| 3416 | |
| 3417 | |
|
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3418 // Determine if InstanceKlass has a previous version. |
|
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3419 bool InstanceKlass::has_previous_version() const { |
|
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3420 return (_previous_versions != NULL && _previous_versions->length() > 0); |
| 0 | 3421 } // end has_previous_version() |
| 3422 | |
|
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3423 |
|
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|
3424 Method* InstanceKlass::method_with_idnum(int idnum) { |
|
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3425 Method* m = NULL; |
| 0 | 3426 if (idnum < methods()->length()) { |
|
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|
3427 m = methods()->at(idnum); |
| 0 | 3428 } |
| 3429 if (m == NULL || m->method_idnum() != idnum) { | |
| 3430 for (int index = 0; index < methods()->length(); ++index) { | |
|
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|
3431 m = methods()->at(index); |
| 0 | 3432 if (m->method_idnum() == idnum) { |
| 3433 return m; | |
| 3434 } | |
| 3435 } | |
| 3436 } | |
| 3437 return m; | |
| 3438 } | |
| 3439 | |
| 3440 | |
| 3441 // Construct a PreviousVersionNode entry for the array hung off | |
|
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|
3442 // the InstanceKlass. |
|
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|
3443 PreviousVersionNode::PreviousVersionNode(ConstantPool* prev_constant_pool, |
|
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|
3444 bool prev_cp_is_weak, GrowableArray<Method*>* prev_EMCP_methods) { |
| 0 | 3445 |
| 3446 _prev_constant_pool = prev_constant_pool; | |
|
47
2c106685d6d0
6497639: 4/3 Profiling Swing application caused JVM crash
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diff
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|
3447 _prev_cp_is_weak = prev_cp_is_weak; |
| 0 | 3448 _prev_EMCP_methods = prev_EMCP_methods; |
| 3449 } | |
| 3450 | |
| 3451 | |
| 3452 // Destroy a PreviousVersionNode | |
| 3453 PreviousVersionNode::~PreviousVersionNode() { | |
| 3454 if (_prev_constant_pool != NULL) { | |
|
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|
3455 _prev_constant_pool = NULL; |
| 0 | 3456 } |
| 3457 | |
| 3458 if (_prev_EMCP_methods != NULL) { | |
| 3459 delete _prev_EMCP_methods; | |
| 3460 } | |
| 3461 } | |
| 3462 | |
| 3463 | |
| 3464 // Construct a PreviousVersionInfo entry | |
| 3465 PreviousVersionInfo::PreviousVersionInfo(PreviousVersionNode *pv_node) { | |
| 3466 _prev_constant_pool_handle = constantPoolHandle(); // NULL handle | |
| 3467 _prev_EMCP_method_handles = NULL; | |
| 3468 | |
|
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|
3469 ConstantPool* cp = pv_node->prev_constant_pool(); |
|
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|
3470 assert(cp != NULL, "constant pool ref was unexpectedly cleared"); |
|
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|
3471 if (cp == NULL) { |
| 0 | 3472 return; // robustness |
| 3473 } | |
| 3474 | |
|
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|
3475 // make the ConstantPool* safe to return |
| 0 | 3476 _prev_constant_pool_handle = constantPoolHandle(cp); |
| 3477 | |
|
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|
3478 GrowableArray<Method*>* method_refs = pv_node->prev_EMCP_methods(); |
| 0 | 3479 if (method_refs == NULL) { |
|
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|
3480 // the InstanceKlass did not have any EMCP methods |
| 0 | 3481 return; |
| 3482 } | |
| 3483 | |
| 3484 _prev_EMCP_method_handles = new GrowableArray<methodHandle>(10); | |
| 3485 | |
| 3486 int n_methods = method_refs->length(); | |
| 3487 for (int i = 0; i < n_methods; i++) { | |
|
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|
3488 Method* method = method_refs->at(i); |
|
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|
3489 assert (method != NULL, "method has been cleared"); |
|
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|
3490 if (method == NULL) { |
| 0 | 3491 continue; // robustness |
| 3492 } | |
|
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|
3493 // make the Method* safe to return |
| 0 | 3494 _prev_EMCP_method_handles->append(methodHandle(method)); |
| 3495 } | |
| 3496 } | |
| 3497 | |
| 3498 | |
| 3499 // Destroy a PreviousVersionInfo | |
| 3500 PreviousVersionInfo::~PreviousVersionInfo() { | |
| 3501 // Since _prev_EMCP_method_handles is not C-heap allocated, we | |
| 3502 // don't have to delete it. | |
| 3503 } | |
| 3504 | |
| 3505 | |
| 3506 // Construct a helper for walking the previous versions array | |
|
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|
3507 PreviousVersionWalker::PreviousVersionWalker(InstanceKlass *ik) { |
| 0 | 3508 _previous_versions = ik->previous_versions(); |
| 3509 _current_index = 0; | |
| 3510 // _hm needs no initialization | |
| 3511 _current_p = NULL; | |
| 3512 } | |
| 3513 | |
| 3514 | |
| 3515 // Destroy a PreviousVersionWalker | |
| 3516 PreviousVersionWalker::~PreviousVersionWalker() { | |
| 3517 // Delete the current info just in case the caller didn't walk to | |
| 3518 // the end of the previous versions list. No harm if _current_p is | |
| 3519 // already NULL. | |
| 3520 delete _current_p; | |
| 3521 | |
| 3522 // When _hm is destroyed, all the Handles returned in | |
| 3523 // PreviousVersionInfo objects will be destroyed. | |
| 3524 // Also, after this destructor is finished it will be | |
| 3525 // safe to delete the GrowableArray allocated in the | |
| 3526 // PreviousVersionInfo objects. | |
| 3527 } | |
| 3528 | |
| 3529 | |
| 3530 // Return the interesting information for the next previous version | |
| 3531 // of the klass. Returns NULL if there are no more previous versions. | |
| 3532 PreviousVersionInfo* PreviousVersionWalker::next_previous_version() { | |
| 3533 if (_previous_versions == NULL) { | |
| 3534 // no previous versions so nothing to return | |
| 3535 return NULL; | |
| 3536 } | |
| 3537 | |
| 3538 delete _current_p; // cleanup the previous info for the caller | |
| 3539 _current_p = NULL; // reset to NULL so we don't delete same object twice | |
| 3540 | |
| 3541 int length = _previous_versions->length(); | |
| 3542 | |
| 3543 while (_current_index < length) { | |
| 3544 PreviousVersionNode * pv_node = _previous_versions->at(_current_index++); | |
| 6197 | 3545 PreviousVersionInfo * pv_info = new (ResourceObj::C_HEAP, mtClass) |
| 0 | 3546 PreviousVersionInfo(pv_node); |
| 3547 | |
| 3548 constantPoolHandle cp_h = pv_info->prev_constant_pool_handle(); | |
|
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|
3549 assert (!cp_h.is_null(), "null cp found in previous version"); |
|
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|
3550 |
|
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|
3551 // The caller will need to delete pv_info when they are done with it. |
| 0 | 3552 _current_p = pv_info; |
| 3553 return pv_info; | |
| 3554 } | |
| 3555 | |
|
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|
3556 // all of the underlying nodes' info has been deleted |
| 0 | 3557 return NULL; |
| 3558 } // end next_previous_version() |